Added a missing comment

src/testing.py

@@ -214,6 +214,9 @@ class TestGroup:
 
     @classmethod
     def load_json_test_groups(cls, reload: bool = False) -> List[TestGroup]:
+        """
+        Load all the test groups from the local json file, reloading from the HF Hub if requested
+        """
         ArchitectureRequestRecord.load_all(reload=reload)
         test_groups: Dict[str, TestGroup] = {}
         for arr in ArchitectureRequestRecord.all: