Remove repository from tibdex/github-app-token

[Luna712]

This was removed in v2 which means it's just defaulting to the current repository of recloudstream/cloudstream, this could be replaced if you still want to use other repositories though but just removes because that keeps the behavior it does now (AFAIK)

[Luna712]

It can be replaced using something like:

        app_id: ${{ secrets.GH_APP_ID }}
        installation_retrieval_mode: repository
        installation_retrieval_payload: recloudstream/secrets
        private_key: ${{ secrets.GH_APP_KEY }}
        repositories: >-
            ["secrets"]

If you still want to keep it on the other repositories and restore the old behavior btw.