refactor(questions): Make debounce duration longer

Author: pan93412

templates/components/Questions/FilterableSection.html.twig

@@ -19,7 +19,7 @@
 
         <div class="d-flex gap-1">
             <form action="{{ path('app_questions') }}" method="GET">
-                <input type="search" data-model="debounce(100)|query" class="form-control" placeholder="搜尋題目……"
+                <input type="search" data-model="debounce(300)|query" class="form-control" placeholder="搜尋題目……"
                        aria-label="搜尋題目">
             </form>
         </div>