build(deps): bump docker/build-push-action from 6 to 7 (#456)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6 to 7.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](https://github.com/docker/build-push-action/compare/v6...v7)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci.yml

@@ -85,7 +85,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v4
       - name: Build
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           context: .
           platforms: linux/amd64
@@ -122,7 +122,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v4
       - name: Build
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           context: .
           platforms: linux/amd64, linux/arm64, linux/arm
@@ -170,7 +170,7 @@ jobs:
           flavor: latest=false
       - name: Build and push
         id: push
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           context: .
           push: ${{ github.event_name != 'pull_request' }}