Update docker/login-action action to v3 (#5416)

Signed-off-by: milkmaker <milkmaker@mailcow.de>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/rebuild_backup_image.yml

@@ -20,7 +20,7 @@ jobs:
         uses: docker/setup-buildx-action@v2
 
       - name: Login to Docker Hub
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
           username: ${{ secrets.BACKUPIMAGEBUILD_ACTION_DOCKERHUB_USERNAME }}
           password: ${{ secrets.BACKUPIMAGEBUILD_ACTION_DOCKERHUB_TOKEN }}