Update docker/build-push-action digest to ca877d9

Author: renovate[bot]

.github/workflows/docker.yml

@@ -54,7 +54,7 @@ jobs:
 
       - name: Build and push Docker image
         id: push
-        uses: docker/build-push-action@67a2d409c0a876cbe6b11854e3e25193efe4e62d
+        uses: docker/build-push-action@ca877d9245402d1537745e0e356eab47c3520991
         with:
           context: .
           file: ${{ matrix.dockerfile }}