📝 Mention required scope for PAT

Mention which scope/permission is required for the PAT.

Reference: [#31](#31 (reply in thread))

Author: BetaHuhn

README.md

@@ -46,9 +46,7 @@ jobs:
           GH_PAT: ${{ secrets.GH_PAT }}
 ```
 
-In order for the Action to access your repositories you have to specify a [Personal Access token](https://docs.github.com/en/free-pro-team@latest/github/authenticating-to-github/creating-a-personal-access-token) as the value for `GH_PAT`.
-
-> **Note:** `GITHUB_TOKEN` will not work
+In order for the Action to access your repositories you have to specify a [Personal Access token](https://docs.github.com/en/free-pro-team@latest/github/authenticating-to-github/creating-a-personal-access-token) as the value for `GH_PAT` (`GITHUB_TOKEN` will **not** work). The PAT needs the full repo scope ([#31](https://github.com/BetaHuhn/repo-file-sync-action/discussions/31#discussioncomment-674804)).
 
 It is recommneded to set the token as a
 [Repository Secret](https://docs.github.com/en/free-pro-team@latest/actions/reference/encrypted-secrets#creating-encrypted-secrets-for-a-repository).