Update docker/build-push-action digest to 86c2bd0

Author: renovate[bot]

.github/workflows/main.yml

@@ -26,7 +26,7 @@ jobs:
           images: mountainash/openssh-client
 
       - name: Build and push Docker image
-        uses: docker/build-push-action@af5a7ed5ba88268d5278f7203fb52cd833f66d6e
+        uses: docker/build-push-action@86c2bd00318427a320d2cee5bbc61251df6f647e
         with:
           context: .
           push: true