add aws tutorial material

Author: Zhixuan Liu

schedule.html

@@ -76,7 +76,7 @@
       <td align="left">AWS and PyTorch Tutorial</td>
 	  <td>
       <br>AWS Tutorial<br>
-      <br>Pytorch Tutorial<br></td>
+      <br><a href="https://canvas.cmu.edu/courses/49562/files/folder/slides?preview=13140553">Pytorch Tutorial</a><br></td>
       <td align="left">TAs</td>
       <td></td>
     </tr>