Add in Release notes link to any HA Upgrade issue.

config/packages/github.yaml

@@ -21,7 +21,7 @@ rest_command:
     method: POST
     headers:
       Authorization: !secret github_token
-    payload: '{"title":"Home-Assistant {{ version }} available","body":"Home-Assistant {{ version }} is now available"}'
+    payload: '{"title":"Home-Assistant {{ version }} available","body":"Home-Assistant {{ version }} is now available /n https://www.home-assistant.io/latest-release-notes/ "}'
 #-------------------------------------------
 
 #automation: