build(deps): update docker/build-push-action digest to ca877d9

Author: renovate[bot]

.github/workflows/publish.yml

@@ -113,7 +113,7 @@ jobs:
         with:
           platforms: linux/amd64,linux/arm64
       - name: Build and publish model-server Docker image
-        uses: docker/build-push-action@67a2d409c0a876cbe6b11854e3e25193efe4e62d # v6
+        uses: docker/build-push-action@ca877d9245402d1537745e0e356eab47c3520991 # v6
         with:
           context: ./model-server
           file: ./model-server/Dockerfile