try use bracket syntax (#1449)

https://docs.microsoft.com/en-us/azure/devops/pipelines/process/expressions?view=azure-devops#variables

Author: bergmeister

.azure-pipelines-ci/templates/test.yaml

@@ -13,12 +13,12 @@ steps:
   displayName: 'Test'
   inputs:
     targetType: inline
-    pwsh: ${{ parameters.pwsh }}
+    pwsh: $[ parameters.pwsh ]
     script: |
       Import-Module .\tools\appveyor.psm1
       Invoke-AppveyorTest -CheckoutPath $env:BUILD_SOURCESDIRECTORY
 - task: PublishTestResults@2
   inputs:
     testRunner: NUnit
     testResultsFiles: 'TestResults.xml'
-  condition: succeededOrFailed()
+  condition: succeededOrFailed()