Fix Drone web hook URL not being updated

app/models/project_services/drone_ci_service.rb

@@ -32,6 +32,8 @@ class DroneCiService < CiService
 
   def compose_service_hook
     hook = service_hook || build_service_hook
+    # If using a service template, project may not be available
+    hook.url = [drone_url, "/api/hook", "?owner=#{project.namespace.path}", "&name=#{project.path}", "&access_token=#{token}"].join if project
     hook.enable_ssl_verification = enable_ssl_verification
     hook.save
   end