ci: bump docker/build-push-action from 6.7.0 to 6.8.0 (#640)

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

Author: dependabot[bot]

.github/workflows/build.yml

@@ -109,7 +109,7 @@ jobs:
             core.setOutput("tags", tags);
 
       - name: Push Docker image
-        uses: docker/build-push-action@v6.7.0
+        uses: docker/build-push-action@v6.8.0
         id: docker_build_and_push
         with:
           context: "${{ env.DOCKER_EXAMPLES_DIRECTORY }}/${{ env.backend_dir_name }}"