build(deps): bump docker/build-push-action from 6 to 7 (#81)

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](docker/build-push-action@v6...v7)

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

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Author: dependabot[bot]

.github/workflows/docker-publish.yml

@@ -81,7 +81,7 @@ jobs:
           password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
       -
         name: Build SOPEL for ${{ matrix.python_images }}
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         if: github.event_name != 'schedule'
         with:
           builder: ${{ steps.buildx.outputs.name }}
@@ -92,7 +92,7 @@ jobs:
           tags: ${{ steps.tags.outputs.tags }}
       -
         name: Build Nightly SOPEL for ${{ matrix.python_images }}
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         if: github.event_name == 'schedule' && matrix.python_images == env.default_python
         with:
           builder: ${{ steps.buildx.outputs.name }}