[TYP] Correct type hint for Transform.transform return

Author: ksunden

lib/matplotlib/transforms.pyi

@@ -196,7 +196,7 @@ class Transform(TransformNode):
     ) -> Sequence[bool]: ...
     def __sub__(self, other: Transform) -> Transform: ...
     def __array__(self, *args, **kwargs) -> np.ndarray: ...
-    def transform(self, values: ArrayLike) -> Transform: ...
+    def transform(self, values: ArrayLike) -> np.ndarray: ...
     def transform_affine(self, values: ArrayLike) -> np.ndarray: ...
     def transform_non_affine(self, values: ArrayLike) -> ArrayLike: ...
     def transform_bbox(self, bbox: BboxBase) -> Bbox: ...