docs: update character screen reference (#707)

Author: emmanuel-ferdman

website/docs/developer/graphics/display.mdx

@@ -44,7 +44,7 @@ The user sets a message on the character screen and it will be rendered on the s
 Using the service is compatible with the simulator.
 
 -   Service: [character screen](/api/clients/characterscreen/)
--   [Source](https://github.com/microsoft/devicescript/blob/main/packages/drivers/src/characterscreen.ts)
+-   [Source](https://github.com/microsoft/devicescript/blob/main/packages/drivers/src/characterscreendisplay.ts)
 
 ```ts
 import {