Fix type annotations

Author: MetRonnie

cylc/flow/id.py

@@ -23,6 +23,7 @@
 import re
 from typing import (
     TYPE_CHECKING,
+    Any,
     Iterable,
     List,
     Literal,
@@ -368,6 +369,7 @@ def is_null(self) -> bool:
     @overload
     def duplicate(
         self,
+        *,
         cycle: str,
         task: str,
         **kwargs,
@@ -377,13 +379,14 @@ def duplicate(
     @overload
     def duplicate(
         self,
+        *tokens_list: 'Tokens',
         **kwargs,
     ) -> 'Tokens':
         ...
 
     def duplicate(
         self,
-        *tokens_list,
+        *tokens_list: 'Tokens',
         **kwargs,
     ) -> 'Tokens':
         """Duplicate a tokens object.
@@ -418,7 +421,7 @@ def duplicate(
             '~u/w//c/b/01'
 
         """
-        _kwargs = {}
+        _kwargs: dict[str, Any] = {}
         for tokens in (self, *tokens_list):
             _kwargs.update(tokens)
         _kwargs.update(kwargs)