Change docs on WaitUntil to not suggest Poll

src/event_loop.rs

@@ -148,11 +148,12 @@ pub enum ControlFlow {
     /// When the current loop iteration finishes, suspend the thread until either another event
     /// arrives or the given time is reached.
     ///
-    /// Useful for implementing efficient timers. Applications which want to render at the
+    /// Useful for implementing efficient timers, but should not be relied on for real-time needs
-    /// display's native refresh rate should instead use [`Poll`] and the VSync functionality
+    /// like rendering (VSync) or audio. Applications which want to render at the display's native
-    /// of a graphics API to reduce odds of missed frames.
+    /// refresh rate should instead issue a [`Window::request_redraw`] at the end of
+    /// [`WindowEvent::RedrawRequested`].
     ///
-    /// [`Poll`]: Self::Poll
+    /// [`WindowEvent::RedrawRequested`]: crate::window::WindowEvent::RedrawRequested
     WaitUntil(Instant),
 }