Update CPSIoT workshop url

Author: kmfawaz

_data/conferences.yml

@@ -644,7 +644,7 @@
 - name: CPSIoTSec
   description: The Joint Workshop on CPS & IoT Security and Privacy
   year: 2024
-  link: https://cpsiotsec2024.github.io/
+  link: https://cpsiotsec2024b.github.io/
   deadline: ["2024-07-18 23:59"]
   comment: In conjunction with ACM CCS 2024
   date: October 18