Have fixed typo issues

Author: Makoto Koishi

examples/filtering_notifications.py

@@ -1,5 +1,5 @@
 '''
-Created on Jan 25, 2023
+Created on Feb 3, 2023
 
 @author: mkoishi
 
@@ -143,4 +143,4 @@ def main():
         logging.info(f"{set_to_seen} Notifications are set to SEEN.")
 
 if __name__ == '__main__':
-    sys.exit(main())
+    sys.exit(main())