Docs: fix 2 broken links on 'Publish a plugin' topic (#68666)

* Initial commit

Signed-off-by: Joe Perez <joseph.perez@grafana.com>

* Delete Reference folder for now

Signed-off-by: Joe Perez <joseph.perez@grafana.com>

---------

Signed-off-by: Joe Perez <joseph.perez@grafana.com>

docs/sources/developers/plugins/publish-a-plugin/_index.md

@@ -3,9 +3,9 @@ description: Topics related to plugin publishing
 title: Publish a plugin
 ---
 
-# Publish a Grafana plugin
+# Publish a plugin
 
 This section contains topics related to publishing Grafana plugins.
 
-- [Publishing and signing criteria]({{< relref "publishing-and-signing-criteria.md">}})
-- [Publish a plugin]({{< relref "publish-a-plugin.md">}})
+- [Publishing and signing criteria]({{< relref "../publishing-and-signing-criteria.md">}})
+- [Publish or update a plugin]({{< relref "../publish-or-update-a-plugin.md">}})

docs/sources/developers/plugins/publish-or-update-a-plugin.md

@@ -2,7 +2,7 @@
 aliases:
   - share-a-plugin/
 description: Learn how to package and share your plugin.
-title: Publish a plugin
+title: Publish or update a plugin
 type: docs
 ---
 

docs/sources/developers/plugins/reference/_index.md

@@ -1,10 +0,0 @@
----
-description: Reference topics.
-title: Reference
----
-
-# Reference
-
-This section contains a metadata reference for plugin development.
-
-- [{{< relref "plugin.json">}}](metadata.md)