icalendar: fix arg name

Fixes #13406

Author: hauntsaninja

stubs/icalendar/icalendar/timezone/tzp.pyi

@@ -23,7 +23,7 @@ class TZP:
     def fix_rrule_until(self, rrule: rrule, ical_rrule: vRecur) -> None: ...
     def create_timezone(self, timezone_component: Timezone) -> datetime.tzinfo: ...
     def clean_timezone_id(self, tzid: str) -> str: ...
-    def timezone(self, id: str) -> datetime.tzinfo | None: ...
+    def timezone(self, tz_id: str) -> datetime.tzinfo | None: ...
     def uses_pytz(self) -> bool: ...
     def uses_zoneinfo(self) -> bool: ...
     @property