Update sharing markers to use the new format (#103470)

The new behavior is discussed in https://github.com/grafana/website/pull/25064.
The behavior lets writers include block elements like lists and continue the list in the including source.

I've removed the `panels` `ref` URI to fix the link in learning journeys.

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

docs/sources/dashboards/_index.md

@@ -43,12 +43,6 @@ cards:
       href: ./share-dashboards-panels/shared-dashboards/
       description: Share your dashboards with anyone without requiring access to your Grafana organization.
       height: 24
-refs:
-  panels:
-    - pattern: /docs/grafana/
-      destination: /docs/grafana/<GRAFANA_VERSION>/panels-visualizations/panel-overview/
-    - pattern: /docs/grafana-cloud/
-      destination: /docs/grafana-cloud/visualizations/panels-visualizations/panel-overview/
 ---
 
 {{< docs/hero-simple key="hero" >}}
@@ -57,13 +51,13 @@ refs:
 
 ## Overview
 
-{{< shared id="dashboard-overview" >}}
+<section id="dashboard-overview">
 
-A Grafana dashboard is a set of one or more [panels](ref:panels), organized and arranged into one or more rows, that provide an at-a-glance view of related information. These panels are created using components that query and transform raw data from a data source into charts, graphs, and other visualizations.
+A Grafana dashboard is a set of one or more [panels](/docs/grafana/<GRAFANA_VERSION>/panels-visualizations/panel-overview/), organized and arranged into one or more rows, that provide an at-a-glance view of related information. These panels are created using components that query and transform raw data from a data source into charts, graphs, and other visualizations.
 
 A data source can be an SQL database, Grafana Loki, Grafana Mimir, or a JSON-based API. It can even be a basic CSV file. Data source plugins take a query you want answered, retrieve the data from the data source, and reconcile the differences between the data model of the data source and the data model of Grafana dashboards.
 
-{{< /shared >}}
+</section>
 
 Queries allow you to reduce the entirety of your data to a specific dataset, providing a more manageable visualization. Since data sources have their own distinct query languages, Grafana dashboards provide you with a query editor to accommodate these differences.
 

docs/sources/dashboards/build-dashboards/create-dashboard/index.md

@@ -90,7 +90,7 @@ Dashboards and panels allow you to show your data in visual form. Each panel nee
 
 **To create a dashboard**:
 
-{{< shared id="create-dashboard" >}}
+<section id="create-dashboard">
 
 1. Click **Dashboards** in the main menu.
 1. Click **New** and select **New Dashboard**.
@@ -98,7 +98,7 @@ Dashboards and panels allow you to show your data in visual form. Each panel nee
 
    ![Empty dashboard state](/media/docs/grafana/dashboards/empty-dashboard-10.2.png)
 
-{{< /shared >}}
+</section>
 
 1. In the dialog box that opens, do one of the following: