Update docker/metadata-action digest to 6b695f7

Author: renovate[bot]

.github/workflows/build-publish.yml

@@ -76,7 +76,7 @@ jobs:
       # https://github.com/docker/metadata-action
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@8d8c7c12f7b958582a5cb82ba16d5903cb27976a
+        uses: docker/metadata-action@6b695f7a8a3e9ce07613674750ee68840e5b6a1e
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           tags: |