another typo

Author: logicdavid

index.html

@@ -48,7 +48,7 @@ <h2>News</h2>
     <li> Starting July 22 2024, I will be giving a one week course at Nankai University in Tianjin, as part of the Nankai Logic Summer School.
     </li>
     <li>
-      In spring 2025, I will be teaching an introductory set theory courses at HIT. 
+      In spring 2025, I will be teaching an introductory set theory course at HIT. 
     </li>
 </ul>
 </p>