Use TypeAlias where possible for type aliases (#7630)

stdlib/pyexpat/__init__.pyi

@@ -2,7 +2,7 @@ import pyexpat.errors as errors
 import pyexpat.model as model
 from _typeshed import SupportsRead
 from typing import Any, Callable
-from typing_extensions import final
+from typing_extensions import TypeAlias, final
 
 EXPAT_VERSION: str  # undocumented
 version_info: tuple[int, int, int]  # undocumented
@@ -20,7 +20,7 @@ XML_PARAM_ENTITY_PARSING_NEVER: int
 XML_PARAM_ENTITY_PARSING_UNLESS_STANDALONE: int
 XML_PARAM_ENTITY_PARSING_ALWAYS: int
 
-_Model = tuple[int, int, str | None, tuple[Any, ...]]
+_Model: TypeAlias = tuple[int, int, str | None, tuple[Any, ...]]
 
 @final
 class XMLParserType: