Force update devops cli extension to unblock authentication issue

eng/scripts/Update-DevOps-WorkItems.ps1

@@ -25,9 +25,13 @@ if (!$devops_pat) {
 }
 
 az extension show -n azure-devops *> $null
-if (!$?){
+if (!$?) {
   Write-Host 'Installing azure-devops extension'
   az extension add --name azure-devops
+} else {
+  # Force update the extension to the latest version if it was already installed
+  # this is needed to ensure we have the authentication issue fixed from earlier versions
+  az extension update -n azure-devops *> $null
 }
 
 $allVersions = @{}