ci: fix release workflow shell syntax

.github/workflows/release.yml

@@ -121,7 +121,7 @@ jobs:
           if [[ "$published_version" == "$package_version" ]]; then
             exact_version_published="true"
             echo "Version '$package_version' is already published to npm. Skipping publish."
-          } else {
+          else
             echo "Version '$package_version' is not published yet. Proceeding to publish."
           fi