Fix import path for convert_to_ical module

Author: jacklightChen

extensions/cli/ccfddl/convert_to_rss.py

@@ -2,7 +2,7 @@
 from datetime import datetime, timedelta, timezone
 from email.utils import format_datetime
 
-from ccfddl.convert_to_ical import load_mapping, get_timezone, reverse_index
+from convert_to_ical import load_mapping, get_timezone, reverse_index
 
 import yaml