Modify comment

Author: LucasG0

pandas/io/json/_json.py

@@ -300,6 +300,8 @@ def __init__(
             raise ValueError(msg)
 
         obj = obj.copy()
+
+        # Convert DataFrame to handled types before serializing
         if obj.index.nlevels == 1 and isinstance(obj.index, MultiIndex):
             obj.index = obj.index.get_level_values(0)
 
@@ -308,7 +310,7 @@ def __init__(
         timedeltas = obj.select_dtypes(include=["timedelta"]).columns
         if len(timedeltas):
             obj[timedeltas] = obj[timedeltas].applymap(lambda x: x.isoformat())
-        # Convert PeriodIndex to datetimes before serializing
+
         if is_period_dtype(obj.index.dtype):
             obj.index = obj.index.to_timestamp()