Bump docker/build-push-action from 6.14.0 to 6.15.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.14.0 to 6.15.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v6.14.0...v6.15.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/release.yml

@@ -95,7 +95,7 @@ jobs:
           echo "minor=${patch%.*}" >> $GITHUB_OUTPUT
           echo "major=${patch%.*.*}" >> $GITHUB_OUTPUT
       - name: Build and Push release
-        uses: docker/build-push-action@v6.14.0
+        uses: docker/build-push-action@v6.15.0
         if: github.event.release.prerelease == false
         with:
           context: .
@@ -109,7 +109,7 @@ jobs:
           push: true
           build-args: "PYTHON_MATTER_SERVER=${{ needs.build-and-publish-pypi.outputs.version }}"
       - name: Build and Push pre-release
-        uses: docker/build-push-action@v6.14.0
+        uses: docker/build-push-action@v6.15.0
         if: github.event.release.prerelease == true
         with:
           context: .