Explicitly call out that contributions do not require product approval

doc/development/contributing/merge_request_workflow.md

@@ -250,6 +250,8 @@ requirements.
    with any questions.
 1. The new feature does not degrade the user experience of the product.
 
+Contributions do not require approval from the [Product team](https://about.gitlab.com/handbook/product/).
+
 ## Dependencies
 
 If you add a dependency in GitLab (such as an operating system package) please