Update schedule.html

adds day4 recording

_includes/dc/schedule.html

@@ -11,6 +11,7 @@
       <tr> <td>July 22 </td>  <td><a href="https://datacarpentry.org/R-ecology-lesson-alternative/how-r-thinks-about-data.html">Exploring and understanding data</a></td> </tr>
       <tr> <td>Day 3 Recording </td>  <td><a href= "https://drive.google.com/file/d/1pqHMNTwnXwh43TxVIR3s0YABxaauQ-IU/view?usp=drive_link">Recording of Exploring and Understanding Data</a></td> </tr>
       <tr> <td>July 29</td>  <td><a href="https://datacarpentry.org/R-ecology-lesson-alternative/working-with-data.html">Working with data</a></td> </tr>
+      <tr> <td>Day 4 Recording </td>  <td><a href= "https://drive.google.com/file/d/1pvuNHjrVv1GjBOVClqM0jaMtx6DAigG-/view?usp=drive_link">Recording of Working with Data</a></td> </tr>      
       <tr> <td>After</td>  <td><a href="{{ site.post_survey }}{{ site.github.project_title }}" target="_blank">Post-workshop Survey</a></td> </tr>
     </table>
   </div>