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

Author: renovate[bot]

.github/workflows/build-push-latest-flake.yaml

@@ -82,7 +82,7 @@ jobs:
             type=semver${{ matrix.nix_channel.default_tag && ',prefix=flake---' || '' }},pattern=v{{major}}.{{minor}}
             type=semver${{ matrix.nix_channel.default_tag && ',prefix=flake---' || '' }},pattern=v{{major}}.{{minor}}.{{patch}}
       - name: Build image
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           context: .
           file: Dockerfile-flake

.github/workflows/build-push-latest.yaml

@@ -82,7 +82,7 @@ jobs:
             type=semver${{ matrix.nix_channel.default_tag && ',prefix=' || '' }},pattern=v{{major}}.{{minor}}.{{patch}}
       - name: Build and push
         id: docker_build
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           context: .
           push: ${{ github.event.pull_request.base.repo.url == github.event.pull_request.head.repo.url }}