fix docs

crates/bevy_window/src/window.rs

@@ -978,7 +978,7 @@ pub struct WindowDescriptor {
     pub decorations: bool,
     /// Sets whether the cursor is visible when the window has focus.
     pub cursor_visible: bool,
-    /// Sets whether the window grabs the cursor.
+    /// Sets whether or how the window grabs the cursor.
     pub cursor_grab_mode: CursorGrabMode,
     /// Sets whether or not the window listens for 'hits' of mouse activity over _this_ window.
     pub hittest: bool,