Add comment about GITHUB_TOKEN being provided by env

README.md

@@ -45,15 +45,15 @@ jobs:
         id: create_release
         uses: actions/create-release@master
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # This token is provided by Actions, you do not need to create your own token
         with:
           tag_name: ${{ github.ref }}
           release_name: Release ${{ github.ref }}
           draft: false
           prerelease: false
 ```
 
-This will create a [Release](https://help.github.com/en/articles/creating-releases), as well as a [`release` event](https://developer.github.com/v3/activity/events/types/#releaseevent), which could be handled by a third party service, or by GitHub Actions for additional uses, for example the [`@actions/upload-release-asset](https://www.github.com/actions/upload-release-asset) GitHub Action.
+This will create a [Release](https://help.github.com/en/articles/creating-releases), as well as a [`release` event](https://developer.github.com/v3/activity/events/types/#releaseevent), which could be handled by a third party service, or by GitHub Actions for additional uses, for example the [`@actions/upload-release-asset`](https://www.github.com/actions/upload-release-asset) GitHub Action. This uses the `GITHUB_TOKEN` provided by the [virtual environment](https://help.github.com/en/github/automating-your-workflow-with-github-actions/virtual-environments-for-github-actions#github_token-secret), so no new token is needed.
 
 ## Contributing
 We would love you to contribute to `@actions/create-release`, pull requests are welcome! Please see the [CONTRIBUTING.md](CONTRIBUTING.md) for more information.