Update file footer.html

wiki/footer.html

@@ -2,7 +2,7 @@
   <div class="container">
     <div class="row mb-4">
       <div class="col-lg-4 col-xs-12">
-        <h4 class="mb-3">Sponsor</h4>
+        <h3 class="mb-3">Sponsor</h3>
         <img src="https://static.igem.wiki/teams/4825/wiki/sg.png" alt="unable to load the photo" width="60%" />
         <br>
         <br>
@@ -17,7 +17,7 @@
         <br>
         <br>
         <br>
-        <h4 class="mt-lg-0 mt-sm-3">Links</h4>
+        <h3 class="mt-lg-0 mt-sm-3">Links</h3>
           <ul class="m-2 p-2">
             <li><a href="{{ url_for('home') }}">Home</a></li>
             <li><a href="{{ url_for('pages', page='description') }}">Description</a></li>
@@ -28,7 +28,7 @@
           </ul>
       </div>
       <div class="col-lg-4 col-xs-12">
-        <h4 class="mt-lg-0 mt-sm-4 mb-3">Contact</h4>
+        <h3 class="mt-lg-0 mt-sm-4 mb-3">Contact</h3>
         <p>No.3, Antuoshan 6th Road, Xiangmihu Street, Futian, Shenzhen, Guangdong province, China</p>
         <p>Email: scie_igem@outlook.com</p>
         <p>Wechat:</p>