Merge pull request #72310 from kelbrown20/OCPBUGS-29742

OCPBUGS#29742: Adding clarity for arches in Azure docs

Author: kelbrown20

modules/installation-azure-user-infra-uploading-rhcos.adoc

@@ -78,8 +78,12 @@ $ export ACCOUNT_KEY=`az storage account keys list -g ${RESOURCE_GROUP} --accoun
 ifdef::azure[]
 [source,terminal]
 ----
-$ export VHD_URL=`openshift-install coreos print-stream-json | jq -r '.architectures.<architecture>."rhel-coreos-extensions"."azure-disk".url'`
+$ export VHD_URL=`openshift-install coreos print-stream-json | jq -r '.architectures.<architecture>."rhel-coreos-extensions"."azure-disk".url'` 
 ----
++
+where:
+
+`<architecture>`:: Specifies the architecture, valid values include `x86_64` or `aarch64`.
 endif::azure[]
 ifdef::ash[]
 [source,terminal]