Add login step to updater (#2478)

Add login step to udpater

Author: lucacome

.github/workflows/update-docker-images.yml

@@ -52,6 +52,13 @@ jobs:
     outputs:
       needs-updating: ${{ steps.needs.outputs.needs-updating }}
     steps:
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3.3.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Check if update available for nginx image
         id: update
         uses: lucacome/docker-image-update-checker@f50d56412b948cfdbb842c5419372681e0db3df1 # v1.2.1