ci: bump docker/build-push-action from 6.18.0 to 6.19.2

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.18.0 to 6.19.2.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v6.18.0...10e90e3)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: 6.19.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/release-llmd-provider.yml

@@ -36,7 +36,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build and push Docker image
-        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6
+        uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8 # v6
         with:
           context: .
           file: providers/llmd/Dockerfile