Updated Handling variables in the watched URL (markdown)

Handling-variables-in-the-watched-URL.md

@@ -13,3 +13,5 @@ https://changedetection.io/test.txt?date=24.10.2022
 ```
 
 List of accepted timezones https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
+List of date format codes (the `%d` etc) https://docs.python.org/3/library/datetime.html#strftime-and-strptime-format-codes
+