External CI: update curl headers (#4579)

.azuredevops/templates/steps/gh-actions-post.yml

@@ -21,9 +21,10 @@ steps:
     targetType: inline
     workingDirectory: $(Build.SourcesDirectory) 
     script: |
-      curl -X POST \
-        -H "Accept: application/vnd.github.everest-preview+json" \
-        -H "Authorization: token ${{ parameters.githubActionsToken }}" \
+      curl -L -X POST \
+        -H "Accept: application/vnd.github+json" \
+        -H "Authorization: Bearer ${{ parameters.githubActionsToken }}" \
+        -H "X-GitHub-Api-Version: 2022-11-28" \
         https://api.github.com/repos/${{ parameters.repoName }}/dispatches \
         -d '{
           "event_type": "${{ parameters.eventType }}",