Update README (#50)

Author: tibdex

README.md

@@ -2,7 +2,12 @@
 
 This [JavaScript GitHub Action](https://help.github.com/en/actions/building-actions/about-actions#javascript-actions) can be used to impersonate a GitHub App when `secrets.GITHUB_TOKEN`'s limitations are too restrictive and a personal access token is not suitable.
 
-[`secrets.GITHUB_TOKEN`](https://help.github.com/en/actions/configuring-and-managing-workflows/authenticating-with-the-github_token) has limitations such as [not being able to triggering a new workflow from another workflow](https://github.community/t5/GitHub-Actions/Triggering-a-new-workflow-from-another-workflow/td-p/31676).
+For instance, from [GitHub Actions' docs](https://docs.github.com/en/actions/using-workflows/triggering-a-workflow#triggering-a-workflow-from-a-workflow):
+
+> When you use the repository's `GITHUB_TOKEN` to perform tasks, events triggered by the `GITHUB_TOKEN`, with the exception of `workflow_dispatch` and `repository_dispatch`, will not create a new workflow run.
+> This prevents you from accidentally creating recursive workflow runs.
+> For example, if a workflow run pushes code using the repository's `GITHUB_TOKEN`, a new workflow will not run even when the repository contains a workflow configured to run when push events occur.
+
 A workaround is to use a [personal access token](https://help.github.com/en/github/authenticating-to-github/creating-a-personal-access-token-for-the-command-line) from a [personal user/bot account](https://help.github.com/en/github/getting-started-with-github/types-of-github-accounts#personal-user-accounts).
 However, for organizations, GitHub Apps are [a more appropriate automation solution](https://developer.github.com/apps/differences-between-apps/#machine-vs-bot-accounts).