Update azd-hooks/predeploy.ps1

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: pauldotyu

azd-hooks/predeploy.ps1

@@ -102,7 +102,8 @@ makelineService:
 
 # Add Azure Service Bus to makeline-service if provided
 # (Parity with bash: check URI presence but write HOST value)
-if ($env:AZURE_SERVICE_BUS_URI) {
+# (Parity with bash: check HOST presence and write HOST value)
+if ($env:AZURE_SERVICE_BUS_HOST) {
 @"
   orderQueueHost: ${env:AZURE_SERVICE_BUS_HOST}
 "@ | Out-File -FilePath custom-values.yaml -Append -Encoding utf8