Update README.md

Author: sanbox-irl

README.md

@@ -16,7 +16,7 @@ There are five things you need to do to use this library correctly:
 
 ## Complete example (without a renderer)
 
-```no_run
+```rs
 use imgui::Context;
 use imgui_winit_support::{HiDpiMode, WinitPlatform};
 use std::time::Instant;
@@ -91,4 +91,4 @@ Licensed under either of
 - Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or https://www.apache.org/licenses/LICENSE-2.0)
 - MIT license ([LICENSE-MIT](LICENSE-MIT) or https://opensource.org/licenses/MIT)
 
-at your option.
+at your option.