Merge pull request #104071 from openshift-cherrypick-robot/cherry-pick-104064-to-enterprise-4.21

[enterprise-4.21] [OSDOCS#17643]Add ap-southeast-6 region to ROSA HCP docs

Author: EricPonvelle

modules/rosa-sdpolicy-am-regions-az.adoc

@@ -98,6 +98,11 @@ ifdef::openshift-rosa-hcp[]
 |4.16.34; 4.17.15
 |Yes
 
+|ap-southeast-6
+|Auckland
+|4.19.18
+|Yes
+
 |ap-southeast-7
 |Thailand
 |4.18