docs: add links to technical guides in user guides (#13108)

www/apps/user-guide/app/customers/manage/page.mdx

@@ -116,7 +116,7 @@ The original customer will then receive a notification requesting their approval
 
 <Note>
 
-If a notification isn't sent, check with your technical team to debug the integrated notification service.
+If a notification isn't sent, check with your technical team to debug the [integrated notification service](!resources!/infrastructure-modules/notification).
 
 </Note>