Add instruction for code review limit. (#168)

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Signed-off-by: Xuejie(Alicia) Tang <tangxuejie96@163.com>

Author: aliciatang07

README.md

@@ -105,6 +105,10 @@ This action can be used to automatically review pull requests when they are
 opened. For a detailed guide on how to set up the pull request review system,
 go to the [GitHub PR Review workflow documentation](./examples/workflows/pr-review).
 
+There is a [known issue](https://github.com/google-github-actions/run-gemini-cli/issues/169) that action bot may approve the PR occasionally, 
+to avoid this situation as org owner you can restrict who can approve the PR following
+[Code Review Limits](https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/managing-repository-settings/managing-pull-request-reviews-in-your-repository#enabling-code-review-limits).
+
 ### Gemini CLI Assistant
 
 This type of action can be used to invoke a general-purpose, conversational Gemini