Fix arrow function syntax in users map

Remove incorrect semicolon - users map uses implicit return
with arrow function (user) => ( ... ) not { return ... }

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/admin/users/page.tsx

@@ -333,8 +333,7 @@ export default function UsersPage() {
             )}
             </div>
           </div>
-          );
-        })}
+        ))}
       </div>
 
       {users.length === 0 && (