chore(deps): update docker/build-push-action action to v7

Author: renovate[bot]

.github/workflows/docker.yml

@@ -75,7 +75,7 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Build and push (scratch)
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           context: .
           file: ./Dockerfile${{ matrix.type != '' && format('.{0}', matrix.type) || '' }}