Corrected github token environment variable to conform to secrets as stored on devops environment

Author: timayabi2020

azure-pipelines/powershell-docs.yml

@@ -66,9 +66,10 @@ jobs:
   - task: PowerShell@2
     displayName: Pushing to github
     env:
-      GITHUB_TOKEN: ${env:GITHUB_TOKEN}
+      GITHUB_TOKEN: $(GITHUB_TOKEN)
     inputs:
       targetType: inline
+      pwsh: true
       script: |
         git config --global user.email "[email protected]"
         git config --global user.name "Timothy Wamalwa"
@@ -77,6 +78,6 @@ jobs:
         $proposedBranch = "weekly_update_help_files_"+$date
         git add .
         git commit -m "Updating help files "+$date
-        git push --set-upstream "https://${env:GITHUB_TOKEN}@github.com/MicrosoftDocs/microsoftgraph-docs-powershell.git" $proposedBranch
+        git push --set-upstream "https://$(GITHUB_TOKEN)@github.com/MicrosoftDocs/microsoftgraph-docs-powershell.git" $proposedBranch
         git status