Update UserInputService.yaml

Author: lack-of-gravity-jack

content/en-us/reference/engine/classes/UserInputService.yaml

@@ -1177,7 +1177,8 @@ methods:
     description: |
       This function returns a `Datatype.Vector2` representing the current screen
       location of the player's `Class.Mouse` in pixels relative to the top left
-      corner. This does not account for the `Class.GuiObject` inset.
+      corner. This does not account for the `Enum.ScreenInsets`. To get the
+      top left and bottom right insets, call `Class.GuiService:GetGuiInset'.
 
       If the location of the mouse pointer is offscreen or the player's device
       does not have a mouse, the returned value will be undetermined.