chore(deps): bump docker/build-push-action from 6.7.0 to 6.8.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.7.0 to 6.8.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v6.7.0...v6.8.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/docker-publish.yml

@@ -38,13 +38,13 @@ jobs:
           registry: ${{ env.REGISTRY }}
       - name: Push to GitHub Packages - Nightly
         if: github.ref == 'refs/heads/main' || github.event.inputs.tag == 'main'
-        uses: docker/build-push-action@v6.7.0
+        uses: docker/build-push-action@v6.8.0
         with:
           push: true
           tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:nightly
       - name: Push to GitHub Packages - Release
         if: startsWith(github.ref, 'refs/tags/v') || startsWith(github.event.inputs.tag, 'v')
-        uses: docker/build-push-action@v6.7.0
+        uses: docker/build-push-action@v6.8.0
         with:
           push: true
           tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest,${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.get-version.outputs.version }}