Update src/mcpm/clients/managers/goose.py

Co-authored-by: qodo-merge-pro[bot] <151058649+qodo-merge-pro[bot]@users.noreply.github.com>

Author: JoJoJoJoJoJoJo

src/mcpm/clients/managers/goose.py

@@ -175,7 +175,7 @@ def to_client_format(self, server_config: ServerConfig) -> Dict[str, Any]:
             if non_empty_env:
                 result["envs"] = non_empty_env
         elif isinstance(server_config, CustomServerConfig):
-            result = server_config.config
+            result = dict(server_config.config)
             result["type"] = "builtin"
         else:
             result = server_config.to_dict()