Fix pos-only params in tkinter module (#11506)

Author: sobolevn

stdlib/tkinter/__init__.pyi

@@ -665,7 +665,9 @@ class Wm:
     iconmask = wm_iconmask
     def wm_iconname(self, newName: Incomplete | None = None) -> str: ...
     iconname = wm_iconname
-    def wm_iconphoto(self, default: bool, __image1: _PhotoImageLike | str, *args: _PhotoImageLike | str) -> None: ...
+    def wm_iconphoto(
+        self, default: bool, *args: Unpack[tuple[_PhotoImageLike | str, Unpack[tuple[_PhotoImageLike | str, ...]]]]
+    ) -> None: ...
     iconphoto = wm_iconphoto
     def wm_iconposition(self, x: int | None = None, y: int | None = None) -> tuple[int, int] | None: ...
     iconposition = wm_iconposition