modify demo questions

static/index.html

@@ -21,10 +21,10 @@
     <div class="demo">
         <h3>Demo Questions</h3>
         <button class="question_btn">Give me a pub of J coleman</button>
-        <button class="question_btn">Give me a pub of J coleman</button>
-        <button class="question_btn">Give me a pub of J coleman</button>
-        <button class="question_btn">Give me a pub of J coleman</button>
-        <button class="question_btn">Give me a pub of J coleman</button>
+        <button class="question_btn">What is the position of J coleman (deprecated)</button>
+        <button class="question_btn">Give me a pub on neural network</button>
+        <button class="question_btn">Give me a pub published in 2023 (deprecated)</button>
+        <button class="question_btn">Give me a pub on math</button>
     </div>
 </body>
 </html>