fix link to canvas example
@@ -22,7 +22,7 @@ don't break when rendered by mdbook.
| [`nineslice`](https://github.com/17cupsofcoffee/tetra/blob/master/examples/nineslice.rs) | Graphics | Slices a texture into nine segments to display a dialog box. |
| [`scaling`](https://github.com/17cupsofcoffee/tetra/blob/master/examples/scaling.rs) | Graphics | Demonstrates the different screen scaling algorithms. |
| [`shaders`](https://github.com/17cupsofcoffee/tetra/blob/master/examples/shaders.rs) | Graphics | Uses a custom shader to render a texture. |
-| [`canvas`](https://github.com/17cupsofcoffee/tetra/blob/master/examples/render_target.rs) | Graphics | Uses a custom render target to apply post-processing effects. |
+| [`canvas`](https://github.com/17cupsofcoffee/tetra/blob/master/examples/canvas.rs) | Graphics | Uses a custom render target to apply post-processing effects. |
| [`audio`](https://github.com/17cupsofcoffee/tetra/blob/master/examples/audio.rs) | Audio | Plays back an audio file. |
| [`keyboard`](https://github.com/17cupsofcoffee/tetra/blob/master/examples/keyboard.rs) | Input | Moves a texture around based on keyboard input. |
| [`animation_controller`](https://github.com/17cupsofcoffee/tetra/blob/master/examples/animation_controller.rs) | Input | Moves a sprite around, with the animation changing based on keyboard input. |
