chore(deps): update docker/metadata-action action to v6

Author: renovate[bot]

.github/workflows/release.yml

@@ -87,7 +87,7 @@ jobs:
 
       - name: Docker Metadata
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: informaticsmatters/squonk2-data-manager-ui
           tags: |