https://dsdmoj.atlassian.net/browse/CDPTKAN-296?atlOrigin=eyJpIjoiODQ2MTBkYTE0NzE3NDJhMzljZDU2ZmRmMGQxZTc4MzAiLCJwIjoiaiJ9 (#2906)

Swapped the slack webhook to the moj forms notification channel.

The webhook was only used for the deleted form action.

The webhook is held in the deploy repo and imported in during the build process.

Author: mattempty

app/controllers/admin/services_controller.rb

@@ -406,7 +406,7 @@ def load_service_and_metadata_corresponding_to_id
     end
 
     def webhook
-      ENV['SLACK_PUBLISH_WEBHOOK']
+      ENV['SLACK_PUBLISH_FOR_CONTENT_WEBHOOK']
     end
 
     def has_ever_been_live?