Fix polar type stubs

Author: dstansby

lib/matplotlib/projections/polar.pyi

@@ -17,8 +17,8 @@ class PolarTransform(mtransforms.Transform):
         self,
         axis: PolarAxes | None = ...,
         use_rmin: bool = ...,
-        _apply_theta_transforms: bool = ...,
         *,
+        apply_theta_transforms: bool = ...,
         scale_transform: mtransforms.Transform | None = ...,
     ) -> None: ...
     def inverted(self) -> InvertedPolarTransform: ...
@@ -35,7 +35,8 @@ class InvertedPolarTransform(mtransforms.Transform):
         self,
         axis: PolarAxes | None = ...,
         use_rmin: bool = ...,
-        _apply_theta_transforms: bool = ...,
+        *,
+        apply_theta_transforms: bool = ...,
     ) -> None: ...
     def inverted(self) -> PolarTransform: ...