docs(contribute): fix desktop contribution guide card

Author: list-jonas

content/docs/contribute/desktop/index.mdx

@@ -6,5 +6,5 @@ import { BookIcon, HammerIcon } from 'lucide-react'
 
 <Cards>
   <Card title="Building Zen" icon={<BookIcon />} description="Getting Started with Zen Browser Development" href="/contribute/desktop/building" />
-  <Card title="Working on Zen" icon={<HammerIcon />} description="Getting Started with Zen's Homepage Development" href="/contribute/desktop/working" />
+  <Card title="Code Structure" icon={<BookIcon />} description="Zen Browser Code Structure and Preference Management" href="/contribute/desktop/code-structure-and-prefs" />
 </Cards>