Update app.py

app.py

@@ -45,7 +45,10 @@ description = '''
 </th>
 </table>
 
-<h4> The reconstruction + refinement + video take about 200 seconds for single image. <br> <span style="color:red"> ICON is only suitable for humanoid images and will not work well on cartoons with non-human shapes.</span></h4>
+<center>
+<h2> The reconstruction + refinement + video takes about 200 seconds for a single image. </h2> 
+<h2><span style="color:red"> ICON is only suitable for humanoid images and will not work well on cartoons with non-human shapes.</span></h2>
+</center>
 
 <details>