docs: Add PR info doc (#31833)

Author: mdrxy

docs/docs/contributing/tutorials/docs.mdx

@@ -4,7 +4,7 @@ This tutorial will guide you through making a simple documentation edit, like co
 
 ### **Prerequisites**
 - GitHub account.
-- Familiarity with GitHub pull requests (basic understanding).
+- Familiarity with [GitHub pull requests](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/about-pull-requests) (basic understanding).
 
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