Update custom-schedule.html

edited description for day 1

_includes/custom-schedule.html

@@ -13,7 +13,7 @@ <h3>Session Schedule</h3>
         <tr>
           <td>August 19, 2024</td>
           <td>The Unix Shell</td>
-          <td> Covers the basics of the Unix shell, how to use the command line and essential commands for navigating the file system and manipulating files </td>
+          <td> Basics of the Unix shell: how to use the command line and useful commands for navigating the file system and manipulating files </td>
         </tr>
         <tr>
           <td>August 20, 2024</td>