Update windows-powershell.yml

Author: dolauli

.azure-pipelines/windows-powershell.yml

@@ -6,7 +6,7 @@ variables:
   TestTarget: Test
   Configuration: Debug
   DebugLocalBuildTasks: true
-  IsGenerateBased: $[eq(variables['system.pullRequest.targetBranch'], 'generation')]
+  IsGenerateBased: $[startsWith(variables['system.pullRequest.targetBranch'], 'generation')]
   BuildTimeoutInMinutes: 120
   AnalysisTimeoutInMinutes: 120
   EnableTestCoverage: true