Update docker/metadata-action action to v5 (#34)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Andreas Heinrich <andreas.heinrich@rwth-aachen.de>

Author: renovate[bot]

.github/workflows/deploy-single-docker-image.yml

@@ -196,7 +196,7 @@ jobs:
         echo "platforms=${result}" >> $GITHUB_OUTPUT
     - name: Extract metadata
       id: meta
-      uses: docker/metadata-action@v3
+      uses: docker/metadata-action@v5
       with:
         sep-tags: ','
         images: |