ci: fixing image letters case 2

Author: maxskorr

.github/workflows/docker-publish.yml

@@ -29,7 +29,7 @@ jobs:
       # Convert repository owner to lowercase (required for GHCR image names)
       - name: Set lowercase repository owner
         id: repo_owner
-        run: echo "lowercase=$(echo \"${GITHUB_REPOSITORY_OWNER}\" | tr '[:upper:]' '[:lower:]')" >> "$GITHUB_OUTPUT"
+        run: echo "lowercase=$(echo ${GITHUB_REPOSITORY_OWNER} | tr '[:upper:]' '[:lower:]')" >> "$GITHUB_OUTPUT"
 
       # Log in to GitHub Container Registry using the auto-generated token
       - name: Log in to GHCR