Update lecture link to include a valid URL

Author: AnanyaBal

schedule.html

@@ -408,7 +408,7 @@
 
     <tr>
       <td sdnum="1033;0;@" align="left">Lecture 21<br>Monday 11/17/25</td>
-      <td align="left"><a href="">Action Recognition and Videos I</a></td>
+      <td align="left"><a href="https://canvas.cmu.edu/courses/49562/files/folder/slides?preview=13564535">Action Recognition and Videos I</a></td>
       <td align="left">
         <br>Readings:
         <br>#1: <a href="https://arxiv.org/abs/1604.00449">Karen Simonyan, Andrew Zisserman </a>