Update azure-pipelines.yml

Docs were wrong???

Author: jonathanpeppers

azure-pipelines.yml

@@ -42,7 +42,7 @@ jobs:
   - task: PublishTestResults@2
     displayName: 'Publish Test Results'
     inputs:
-      testResultsFormat: 'NUnit'
+      testRunner: NUnit
       testResultsFiles: 'TestResult-*.xml'
     continueOnError: true
     condition: succeededOrFailed()