update JC time

Author: ZhenyuanJin

blog/index.html

@@ -25,8 +25,8 @@ <h2>{{ site.blog_description }}</h2>
   <h3><b>Time &amp; Place</b></h3>
   <hr>
   <p>
-    <li>13:30 - 18:00, <b>Wednesday</b>, Room 342 (stream online)</li>
-    <li>10:00 - 12:00, <b>Friday</b>, Room 342 (stream online)</li>
+    <li>13:30 - 16:00, <b>Wednesday</b>, Room 342 (stream online)</li>
+    <li>10:00 - 18:00, <b>Friday</b>, Room 342 (stream online)</li>
 
   </p>
   <p style="text-indent:1em;">