Update schedule.html

Author: AnanyaBal

schedule.html

@@ -124,7 +124,7 @@
 
     <tr>
       <td sdnum="1033;0;@" align="left">Lecture 6<br>Wednesday 09/17/25</td>
-      <td align="left"> <a href="">Attention and Transformers II </a></td>
+      <td align="left"> <a href="https://canvas.cmu.edu/courses/49562/files/folder/slides?preview=13233915">Attention and Transformers II </a></td>
        <td align="left">
         <br>Readings:
         <br>#1: <a href="https://arxiv.org/abs/2010.11929">Alexey Dosovitskiy et al.</a>