Add Key::Quote (#4683)

* Part of https://github.com/emilk/egui/issues/3653

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It was surprising to me that this key wasn't sending `Event::Key` events
(only `Event::Text`), so I added a `Key` for it.

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>

crates/egui-winit/src/lib.rs

@@ -1137,6 +1137,7 @@ fn key_from_key_code(key: winit::keyboard::KeyCode) -> Option<egui::Key> {
         KeyCode::BracketLeft => Key::OpenBracket,
         KeyCode::BracketRight => Key::CloseBracket,
         KeyCode::Backquote => Key::Backtick,
+        KeyCode::Quote => Key::Quote,
 
         KeyCode::Cut => Key::Cut,
         KeyCode::Copy => Key::Copy,