Update docker/build-push-action digest to 55146d9

Author: renovate[bot]

.github/workflows/docker-publish.yml

@@ -88,7 +88,7 @@ jobs:
 
       - name: Build and push Docker image to both registries
         id: build-and-push
-        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83
+        uses: docker/build-push-action@55146d969b0dff1a5c12630229609757af5b1081
         with:
           context: .
           file: Dockerfile