updating contribution.md under docs in github

Author: yashhd

CONTRIBUTING.md

@@ -93,6 +93,8 @@ If you've found something in the content or the website that should be updated,
 ### :hammer_and_wrench: Pull requests
 A [pull request](https://docs.github.com/en/github/collaborating-with-issues-and-pull-requests/about-pull-requests) is a way to suggest changes in our repository.
 
+REST content is autogenerated and should not be modified by mortals.
+
 When we merge those changes, they should be deployed to the live site within 24 hours. :earth_africa: To learn more about opening a pull request in this repo, see [Opening a pull request](#opening-a-pull-request) below.
 
 ### :question: Support