[bindings] fix signatures in pyi files

src/Mod/Part/App/ChFi2d/ChFi2d_ChamferAPI.pyi

@@ -1,3 +1,7 @@
+# SPDX-License: LGPL-2.1-or-later
+
+from __future__ import annotations
+
 from Base.Metadata import export, constmethod
 from typing import Tuple, overload
 
@@ -25,7 +29,7 @@ class ChFi2d_ChamferAPI(PyObjectBase):
         """
         ...
 
-    def perform(self, radius: float) -> bool:
+    def perform(self, radius: float, /) -> bool:
         """
         perform(radius) -> bool
 
@@ -33,7 +37,7 @@ class ChFi2d_ChamferAPI(PyObjectBase):
         """
         ...
 
-    def result(self, point: object, solution: int = -1) -> Tuple[object, object, object]:
+    def result(self, point: object, solution: int = -1, /) -> Tuple[object, object, object]:
         """
         result(point, solution=-1)