Update GEI IPs in GHEC with DR (AU Stamp) (#55763)

Author: jschanfung

content/admin/data-residency/network-details-for-ghecom.md

@@ -130,8 +130,6 @@ You must allow:
 
 ### Required in Australia
 
-* 20.213.236.72/29
-* 20.53.178.216/29
 * 20.213.241.72/29
 * 20.11.90.48/29
 * 20.5.34.240/28