Add limitations section to readme

README.md

@@ -61,6 +61,10 @@ jobs:
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 <img src="/screenshot.png" alt="output screenshot" title="output screenshot" width="500" />
 
+## Limitations
+
+GitHub restricts the maximum permissions to read-only for personal access tokens for pull requests originating from a public forked repository (read more [here](https://docs.github.com/en/actions/security-guides/automatic-token-authentication#permissions-for-the-github_token)). This prevents the default configuration of this action from successfully posting the report as a PR comment when using it on public repositories with limited permissions for users to create branches and therefore requiring them to create pull requests from forks.
+
 ## Code of Conduct
 
 Please read the [full Code of Conduct](CODE_OF_CONDUCT.md) so that you can understand what we expect project participants to adhere to and what actions will and will not be tolerated.