Update sync-build-release.yml

Enable sparse checkout for Git operations in workflow.

Author: daveleroy

.github/workflows/sync-build-release.yml

@@ -44,6 +44,8 @@ jobs:
         run: |
           git config user.name github-actions
           git config user.email github-actions@github.com
+          git config core.sparsecheckout true
+          echo .github/ >> .git/info/sparse-checkout
           git fetch --tags https://github.com/${{ inputs.upstream }}.git
           git push --tags