Update the start time of the December event (#701)

Author: InessaPawson

calendars/contributor-experience.yaml

@@ -9,8 +9,8 @@ events:
       follow the link: https://hackmd.io/QcgnpSe_SnWx7DmdkGCUSw
 
       Join us via Zoom: https://us02web.zoom.us/j/82394007198
-    begin: 2024-12-06 13:30:00 +00:00
-    end: 2024-12-06 14:30:00 +00:00
+    begin: 2024-12-06 15:30:00 +00:00
+    end: 2024-12-06 16:30:00 +00:00
     url: https://us02web.zoom.us/j/82394007198
     repeat:
       interval: