Fix vertical position in first_rect_for_character_range

crates/gpui2/src/platform/mac/window.rs

@@ -1485,7 +1485,9 @@ extern "C" fn first_rect_for_character_range(
             NSRect::new(
                 NSPoint::new(
                     frame.origin.x + bounds.origin.x.0 as f64,
-                    frame.origin.y + frame.size.height - bounds.origin.y.0 as f64,
+                    frame.origin.y + frame.size.height
+                        - bounds.origin.y.0 as f64
+                        - bounds.size.height.0 as f64,
                 ),
                 NSSize::new(bounds.size.width.0 as f64, bounds.size.height.0 as f64),
             )