Update winit window example link (BrainiumLLC#83)

README.md

@@ -54,7 +54,7 @@ After some straightforward prompts, you'll be asked to select a template pack. T
 | bevy | Minimal Bevy project derived from [sprite](https://github.com/bevyengine/bevy/blob/master/examples/2d/sprite.rs) example |
 | bevy-demo | Bevy [breakout](https://github.com/bevyengine/bevy/blob/master/examples/game/breakout.rs) demo |
 | wgpu | Minimal wgpu project derived from [hello-triangle](https://github.com/gfx-rs/wgpu-rs/tree/master/examples/hello-triangle) example |
-| winit | Minimal winit project derived from [window](https://github.com/rust-windowing/winit/tree/master/examples/window) example |
+| winit | Minimal winit project derived from [window](https://github.com/rust-windowing/winit/blob/master/examples/window.rs) example |
 
 **Template pack contribution is encouraged**; we'd love to have very nice template packs for Bevy, Amethyst, and whatever else people find helpful! We'll write up a guide for template pack creation soon, but in the mean time, the existing ones are a great reference point. Any template pack placed into `~./cargo-mobile/templates/apps/` will appear as an option in `cargo mobile init`.