chore(debugging): add link icons

Author: goosewin

fern/debugging.mdx

@@ -199,6 +199,9 @@ When you're stuck:
   icon="user-group"
   href="https://discord.com/invite/pUFNcf2WmH"
 >
+  <div className='absolute top-4 right-4'>
+    <Icon icon="arrow-up-right-from-square" />
+  </div>
   Join the Vapi Discord for real-time help from the community and team
 </Card>
 
@@ -207,6 +210,9 @@ When you're stuck:
   icon="book"
   href="/api-reference"
 >
+  <div className='absolute top-4 right-4'>
+    <Icon icon="arrow-up-right-from-square" />
+  </div>
   Check the API reference for detailed configuration options
 </Card>
 
@@ -215,6 +221,9 @@ When you're stuck:
   icon="fa-light fa-heartbeat"
   href="https://status.vapi.ai/"
 >
+  <div className='absolute top-4 right-4'>
+    <Icon icon="arrow-up-right-from-square" />
+  </div>
   Check real-time status of Vapi services and AI providers
 </Card>