Update the main branch (Azure#27928)

Author: sima-zhu

eng/pipelines/docindex.yml

@@ -37,7 +37,14 @@ jobs:
           arguments: -DocRepoLocation $(DocRepoLocation) -ImageId '$(DocValidationImageId)'
         displayName: Update Docs Onboarding
         condition: and(succeeded(), or(eq(variables['Build.Reason'], 'Schedule'), eq(variables['Force.MainUpdate'], 'true')))
-
+      - task: Powershell@2
+        inputs:
+          pwsh: true
+          filePath: eng/common/scripts/Update-DocsMsToc.ps1
+          arguments: >-
+            -DocRepoLocation $(DocRepoLocation)
+            -OutputLocation $(DailyDocRepoLocation)/docs-ref-mapping/reference-unified.yml
+        displayName: Generate ToC for main branch
       # Push changes to docs repo
       - template: /eng/common/pipelines/templates/steps/set-default-branch.yml
         parameters: