[Workers] Update wrangler error screen changelog (cloudflare#24559)

* docs: update wrangler error screen changelog

* Update src/content/changelog/workers/2025-08-19-improved-wrangler-error-screen.mdx

Co-authored-by: lrapoport-cf <[email protected]>

* remove footnote

---------

Co-authored-by: lrapoport-cf <[email protected]>

Author: edmundhung

src/content/changelog/workers/2025-08-19-improved-wrangler-error-screen.mdx

@@ -8,7 +8,7 @@ date: 2025-08-19
 
 Wrangler's error screen has received several improvements to enhance your debugging experience!
 
-The error screen now features a refreshed design with support for both light and dark themes, improved source map resolution logic that handles missing source files more reliably, and better error cause display.
+The error screen now features a refreshed design thanks to [youch](https://www.npmjs.com/package/youch), with support for both light and dark themes, improved source map resolution logic that handles missing source files more reliably, and better error cause display.
 
 | Before | After (Light) | After (Dark) |
 |--------|---------------|--------------|