Try fixing CompatHelper workflow

Author: mtfishman

.github/workflows/CompatHelper.yml

@@ -66,7 +66,7 @@ jobs:
               split("${{ inputs.local-registry-names }}", "\n") .|> string
             else
               # Guess the registry name from the last part of the repository URL.
-              map(registry_url -> string(first(split(last(split(registry_url, '/')), '.')), registry_urls))
+              map(registry_url -> string(first(split(last(split(registry_url, '/')), '.'))), registry_urls)
             end
             for (registry_url, registry_name) in zip(registry_urls, registry_names)
               isempty(registry_url) && continue