Don't resend admin email to everyone if one delivery fails

CHANGELOG-EE

 v 7.13.2
   - Fix group web hook
+  - Don't resend admin email to everyone if one delivery fails
 
 v 7.13.1
   - Merge community edition changes for version 7.13.1
@@ -180,4 +181,4 @@ v 6.2.0
   - Use omniauth-ldap nickname attribute as GitLab username
   - Improve group sharing UI for installation with many groups
   - Fix empty LDAP group raises exception
-  - Respect LDAP user filter for git access
\ No newline at end of file
+  - Respect LDAP user filter for git access

app/workers/admin_emails_worker.rb

@@ -3,7 +3,7 @@ class AdminEmailsWorker
 
   def perform(recipient_id, subject, body)
     recipient_list(recipient_id).pluck(:id).each do |user_id|
-      Notify.send_admin_notification(user_id, subject, body).deliver
+      Notify.delay.send_admin_notification(user_id, subject, body)
     end
   end