Update docker/metadata-action digest to b53be03 (#99)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ghcr-io-docker-build.yaml

@@ -52,7 +52,7 @@ jobs:
       # https://github.com/docker/metadata-action
       - name: Extract Jenkins Docker metadata
         id: meta
-        uses: docker/metadata-action@369eb591f429131d6889c46b94e711f089e6ca96
+        uses: docker/metadata-action@b53be03109c4ef6f6cc7aa545b84b17a7fe51c1e
         with:
           images: ${{ env.REGISTRY }}/${{ github.actor }}/jenkinsdsl