docs: adds alt text to images where missing (#84028)

* adds alt text

* makes prettier

docs/sources/fundamentals/intro-histograms/index.md

@@ -32,7 +32,7 @@ and the bar height represents the frequency (such as count) of values that fell
 This _histogram_ shows the value distribution of a couple of time series. You can easily see that
 most values land between 240-300 with a peak between 260-280.
 
-![](/static/img/docs/v43/heatmap_histogram.png)
+![Histogram example](/static/img/docs/v43/heatmap_histogram.png)
 
 Here is an example showing height distribution of people.
 
@@ -48,7 +48,7 @@ A _heatmap_ is like a histogram, but over time, where each time slice represents
 
 In this example, you can clearly see what values are more common and how they trend over time.
 
-![](/static/img/docs/v43/heatmap_histogram_over_time.png)
+![Heatmap example](/static/img/docs/v43/heatmap_histogram_over_time.png)
 
 For more information about heatmap visualization options, refer to [Heatmap][heatmap].
 

docs/sources/fundamentals/timeseries-dimensions/index.md

@@ -29,7 +29,7 @@ In [Introduction to time series][time-series-databases], the concept of _labels_
 
 With time series data, the data often contain more than a single series, and is a set of multiple time series. Many Grafana data sources support this type of data.
 
-{{< figure src="/static/img/docs/example_graph_multi_dim.png" class="docs-image--no-shadow" max-width="850px" >}}
+{{< figure src="/static/img/docs/example_graph_multi_dim.png" class="docs-image--no-shadow" max-width="850px" alt="Temperature by location" >}}
 
 The common case is issuing a single query for a measurement with one or more additional properties as dimensions. For example, querying a temperature measurement along with a location property. In this case, multiple series are returned back from that single query and each series has unique location as a dimension.
 

docs/sources/fundamentals/timeseries/index.md

@@ -32,7 +32,7 @@ Temperature data like this is one example of what we call a _time series_ — a
 
 Tables are useful when you want to identify individual measurements, but they make it difficult to see the big picture. A more common visualization for time series is the _graph_, which instead places each measurement along a time axis. Visual representations like the graph make it easier to discover patterns and features of the data that otherwise would be difficult to see.
 
-{{< figure src="/static/img/docs/example_graph.png" class="docs-image--no-shadow" max-width="850px" >}}
+{{< figure src="/static/img/docs/example_graph.png" class="docs-image--no-shadow" max-width="850px" alt="Temperature data displayed on dashboard" >}}
 
 Temperature data like the one in the example, is far from the only example of a time series. Other examples of time series are:
 

docs/sources/setup-grafana/configure-security/configure-authentication/enhanced-ldap/index.md

@@ -30,11 +30,11 @@ The enhanced LDAP integration adds additional functionality on top of the [LDAP
 
 ## LDAP group synchronization for teams
 
-{{< figure src="/static/img/docs/enterprise/team_members_ldap.png" class="docs-image--no-shadow docs-image--right" max-width= "600px" >}}
-
 With enhanced LDAP integration, you can set up synchronization between LDAP groups and teams. This enables LDAP users that are members
 of certain LDAP groups to automatically be added or removed as members to certain teams in Grafana.
 
+![LDAP group synchronization](/static/img/docs/enterprise/team_members_ldap.png)
+
 Grafana keeps track of all synchronized users in teams, and you can see which users have been synchronized from LDAP in the team members list, see `LDAP` label in screenshot.
 This mechanism allows Grafana to remove an existing synchronized user from a team when its LDAP group membership changes. This mechanism also allows you to manually add
 a user as member of a team, and it will not be removed when the user signs in. This gives you flexibility to combine LDAP group memberships and Grafana team memberships.

docs/sources/setup-grafana/configure-security/configure-authentication/ldap/index.md

@@ -151,19 +151,19 @@ Grafana has an LDAP debug view built-in which allows you to test your LDAP confi
 
 Within this view, you'll be able to see which LDAP servers are currently reachable and test your current configuration.
 
-{{< figure src="/static/img/docs/ldap_debug.png" class="docs-image--no-shadow" max-width="600px" >}}
+{{< figure src="/static/img/docs/ldap_debug.png" class="docs-image--no-shadow" max-width="600px" alt="LDAP testing" >}}
 
 To use the debug view, complete the following steps:
 
 1.  Type the username of a user that exists within any of your LDAP server(s)
 1.  Then, press "Run"
-1.  If the user is found within any of your LDAP instances, the mapping information is displayed
+1.  If the user is found within any of your LDAP instances, the mapping information is displayed.
 
-{{< figure src="/static/img/docs/ldap_debug_mapping_testing.png" class="docs-image--no-shadow" max-width="600px" >}}
+{{< figure src="/static/img/docs/ldap_debug_mapping_testing.png" class="docs-image--no-shadow" max-width="600px" alt="LDAP mapping displayed" >}}
 
 [Grafana Enterprise]({{< relref "../../../../introduction/grafana-enterprise" >}}) users with [enhanced LDAP integration]({{< relref "../enhanced-ldap" >}}) enabled can also see sync status in the debug view. This requires the `ldap.status:read` permission.
 
-{{< figure src="/static/img/docs/ldap_sync_debug.png" class="docs-image--no-shadow" max-width="600px" >}}
+{{< figure src="/static/img/docs/ldap_sync_debug.png" class="docs-image--no-shadow" max-width="600px" alt="LDAP sync status" >}}
 
 ### Bind and bind password
 

docs/sources/setup-grafana/configure-security/configure-team-sync.md

@@ -40,11 +40,12 @@ This mechanism allows Grafana to remove an existing synchronized user from a tea
 
 If you have already grouped some users into a team, then you can synchronize that team with an external group.
 
-{{< figure src="/static/img/docs/enterprise/team_add_external_group.png" class="docs-image--no-shadow docs-image--right" max-width= "600px" >}}
-
 1. In Grafana, navigate to **Administration > Users and access > Teams**.
 1. Select a team.
 1. Go to the External group sync tab, and click **Add group**.
+
+   ![External group sync](/static/img/docs/enterprise/team_add_external_group.png)
+
 1. Insert the value of the group you want to sync with. This becomes the Grafana `GroupID`.
    Examples: