Update docker-publish.yml

changed docker repo target

Author: nirlipo

.github/workflows/docker-publish.yml

@@ -22,7 +22,7 @@ jobs:
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: nirlipo/planimation/backend
+          images: nirlipo/planimation_backend
 
       - name: Build and push Docker image
         uses: docker/build-push-action@v6