Fix shutil.copy2 stub (#6875)

Author: jpy-git

stdlib/shutil.pyi

@@ -24,7 +24,10 @@ def copystat(src: StrOrBytesPath, dst: StrOrBytesPath, *, follow_symlinks: bool
 def copy(src: StrPath, dst: StrPath, *, follow_symlinks: bool = ...) -> _PathReturn: ...
 @overload
 def copy(src: BytesPath, dst: BytesPath, *, follow_symlinks: bool = ...) -> _PathReturn: ...
+@overload
 def copy2(src: StrPath, dst: StrPath, *, follow_symlinks: bool = ...) -> _PathReturn: ...
+@overload
+def copy2(src: BytesPath, dst: BytesPath, *, follow_symlinks: bool = ...) -> _PathReturn: ...
 def ignore_patterns(*patterns: StrPath) -> Callable[[Any, list[str]], set[str]]: ...
 
 if sys.version_info >= (3, 8):