Update docs

Author: marcusolsson

website/docs/annotations.md

@@ -3,7 +3,7 @@ id: annotations
 title: Annotations
 ---
 
-![Annotations](../static/img/annotations.png)
+![Annotations](../static/img/annotation.png)
 
 [Annotations](https://grafana.com/docs/grafana/latest/dashboards/annotations) let you extract data from a data source and use it to annotate a dashboard.
 

website/docs/query-editor.md

@@ -93,6 +93,14 @@ Sets the text to send as a request body.
 Due to limitations in modern browsers, Grafana ignores the request body if the HTTP method is set to GET.
 :::
 
+### Experimental
+
+Try out features that are currently in development. Each feature has a link in its tooltip that takes you to the feature request on GitHub where you can share your feedback.
+
+:::danger
+Experimental features might be unstable and can be removed without notice.
+:::
+
 ### Cache time
 
 By default, Grafana caches the JSON document returned by the last request to avoid hitting rate limits while configuring your query. Once you're happy with your query, consider setting the cache time to **0s** to disable caching.