Fix some typos (#3459)

* Fix typo

* Change from what to was

It doesn't say WHAT changed only that there WAS a change

crates/egui/src/response.rs

@@ -78,7 +78,7 @@ pub struct Response {
     #[doc(hidden)]
     pub interact_pointer_pos: Option<Pos2>,
 
-    /// What the underlying data changed?
+    /// Was the underlying data changed?
     ///
     /// e.g. the slider was dragged, text was entered in a [`TextEdit`](crate::TextEdit) etc.
     /// Always `false` for something like a [`Button`](crate::Button).
@@ -339,7 +339,7 @@ impl Response {
         self.is_pointer_button_down_on
     }
 
-    /// What the underlying data changed?
+    /// Was the underlying data changed?
     ///
     /// e.g. the slider was dragged, text was entered in a [`TextEdit`](crate::TextEdit) etc.
     /// Always `false` for something like a [`Button`](crate::Button).

crates/egui_plot/src/lib.rs

@@ -1405,7 +1405,7 @@ impl PlotUi {
         Vec2::new(delta.x / dp_dv[0] as f32, delta.y / dp_dv[1] as f32)
     }
 
-    /// Read the transform netween plot coordinates and screen coordinates.
+    /// Read the transform between plot coordinates and screen coordinates.
     pub fn transform(&self) -> &PlotTransform {
         &self.last_plot_transform
     }