Update the list of regions that are available gpt-5-mini

Author: justinyoo

infra/main.bicep

@@ -18,7 +18,23 @@ param environmentName string
   'francecentral'
   'germanywestcentral'
   'italynorth'
+  'japaneast'
+  'koreacentral'
+  'northcentralus'
+  'norwayeast'
+  'polandcentral'
+  'southafricanorth'
+  'southcentralus'
+  'southeastasia'
+  'southindia'
+  'spaincentral'
   'swedencentral'
+  'switzerlandnorth'
+  'uaenorth'
+  'uksouth'
+  'westeurope'
+  'westus'
+  'westus3'
 ])
 @metadata({
   azd: {