Update VSTS queue name

.vsts/builds/ci-official.yml

@@ -5,12 +5,12 @@ trigger:
 phases:
 - template: ../templates/blazor-build.yml
   parameters:
-    queueName: VSEng-MicroBuildVS2017
+    queueName: DotNetCore-Windows
     variables:
       SignType: real
       TeamName: AspNetCore
     beforeBuild:
-    - task: securedevelopmentteam.vss-secure-development-tools.build-task-policheck.PoliCheck@1
+    - task: MicroBuildSigningPlugin@1
       displayName: 'Run compliance check'
       inputs:
         targetType: F
@@ -21,6 +21,6 @@ phases:
       condition: and(succeeded(), in(variables['SignType'], 'test', 'real'))
 
     afterBuild:
-    - task: ms-vseng.MicroBuildTasks.521a94ea-9e68-468a-8167-6dcf361ea776.MicroBuildCleanup@1
+    - task: MicroBuildCleanup@1
       displayName: Perform Cleanup Tasks
       condition: succeededOrFailed()