Display correct PowerShell version in CI

Author: andyleejordan

.vsts-ci/templates/ci-general.yml

@@ -4,8 +4,11 @@ parameters:
   default: true
 
 steps:
-- pwsh: $PSVersionTable
+- task: PowerShell@2
   displayName: PowerShell version
+  inputs:
+    script: $PSVersionTable
+    pwsh: ${{ parameters.pwsh }}
 
 - task: PowerShell@2
   displayName: Build and test