update to ESRP@2 to fix build break due to missing .net runtime

Author: davidjen@DAVIDJENDEV

.azure-pipelines/OfficialBuild.yml

@@ -76,7 +76,7 @@ steps:
 
 # https://microsoft.sharepoint.com/teams/prss/esrp/info/ESRP%20Onboarding%20Wiki/Generating%20Signing%20JSON.aspx
 # https://microsoft.sharepoint.com/teams/prss/esrp/info/ESRP%20Onboarding%20Wiki/Selecting%20CodeSign%20Certificates.aspx
-- task: SFP.build-tasks.custom-build-task-1.EsrpCodeSigning@1
+- task: EsrpCodeSigning@2
   displayName: 'ESRP sign vsix packages'
   inputs:
     ConnectedServiceName: ESRPCodeSigningConnection