docs: fix 404 page

Author: boneskull

site/src/content/docs/404.md

@@ -7,6 +7,6 @@ description: Page not found
 
 We've been looking for that page, but…
 
-![We ain't found shit!](/modestbench/comb-the-desert.gif)
+![We ain't found shit!](/comb-the-desert.gif)
 
 [Return to home](/)