Show newly created files in git diff, if any

Author: user202729

.github/workflows/ci-meson.yml

@@ -86,6 +86,7 @@ jobs:
         if: ${{ steps.check_update_meson.outcome == 'failure' }}
         shell: bash -l {0}
         run: |
+          git add --intent-to-add .  # also show newly created files in git diff
           git status
           git diff