Update gitlab.yml.example with new GraphQL Timeout

config/gitlab.yml.example

@@ -145,6 +145,12 @@ production: &base
     # Number of seconds to wait for HTTP response after sending webhook HTTP POST request (default: 10)
     # webhook_timeout: 10
 
+    ### GraphQL Settings
+    # Tells the rails application how long it has to complete a GraphQL request.
+    # We suggest this value to be higher than the database timeout value
+    # and lower than the worker timeout set in unicorn/puma. (default: 30)
+    # graphql_timeout: 30
+
     ## Repository downloads directory
     # When a user clicks e.g. 'Download zip' on a project, a temporary zip file is created in the following directory.
     # The default is 'shared/cache/archive/' relative to the root of the Rails app.