chore: add push to GH

Author: jonlundy

.gitea/workflows/github-mirror.yml

@@ -14,7 +14,7 @@ jobs:
         fetch-tags: true
 
     - name: Deploy to external repository
-      uses: actions/github-action-push-to-another-repository@main
+      uses: https://git.sour.is/actions/github-action-push-to-another-repository@main
       env:
         API_TOKEN_GITHUB: ${{ secrets.GH_TOKEN }}
       with: