Merge pull request #87246 from openshift-cherrypick-robot/cherry-pick-86645-to-enterprise-4.16

[enterprise-4.16] OCPBUGS-46558#adding new region

Author: xenolinux

modules/installation-azure-regions.adoc

@@ -35,6 +35,7 @@ The installation program dynamically generates the list of available Microsoft A
 * `koreacentral` (Korea Central)
 * `koreasouth` (Korea South)
 * `mexicocentral` (Mexico Central)
+* `newzealandnorth` (New Zealand North)
 * `northcentralus` (North Central US)
 * `northeurope` (North Europe)
 * `norwayeast` (Norway East)