Update pathname param of setuptools._distutils.util.convert_path (#13483)

Author: Avasam

stubs/setuptools/setuptools/_distutils/util.pyi

@@ -1,4 +1,4 @@
-from _typeshed import Unused
+from _typeshed import StrPath, Unused
 from collections.abc import Callable, Mapping
 from typing import Literal
 from typing_extensions import TypeVarTuple, Unpack
@@ -10,7 +10,7 @@ def get_platform() -> str: ...
 def get_macosx_target_ver_from_syscfg(): ...
 def get_macosx_target_ver(): ...
 def split_version(s: str) -> list[int]: ...
-def convert_path(pathname: str) -> str: ...
+def convert_path(pathname: StrPath) -> str: ...
 def change_root(new_root: str, pathname: str) -> str: ...
 def check_environ() -> None: ...
 def subst_vars(s: str, local_vars: Mapping[str, str]) -> None: ...