Update docker/build-push-action action to v6.1.0

Author: renovate[bot]

.github/workflows/docker.yml

@@ -40,7 +40,7 @@ jobs:
             type=edge,branch=$repo.default_branch
 
       - name: build+push
-        uses: docker/build-push-action@f6010ea70151369b06f0194be1051fbbdff851b2 # v6.0.2
+        uses: docker/build-push-action@31159d49c0d4756269a0940a750801a1ea5d7003 # v6.1.0
         with:
           platforms: linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64
           push: ${{ github.ref == 'refs/heads/master' }}