ci: fix published smoke workflow yaml

[cafitac]

Summary

• Fixes workflow YAML by replacing an unindented heredoc with a single indented printf command for the pipx wrapper.
• Keeps the pipx wrapper behavior from PR ci: fix pipx setup for published smoke #14 while allowing GitHub Actions to parse both workflow files again.
• Updates tests to assert the wrapper intent rather than the heredoc form.

Verification

• uvx --from pyyaml python ... parsed .github/workflows/publish.yml and .github/workflows/published-install-smoke.yml
• uv run pytest tests/test_published_install_smoke.py -q -> 11 passed
• uv run pytest tests/ -q -> 145 passed
• uv run python scripts/check_release_metadata.py -> OK
• uv run python scripts/smoke_release_readiness.py -> OK
• npm pack --dry-run -> OK
• git diff --check -> OK

Context

• PR ci: fix pipx setup for published smoke #14 fixed the pipx import issue but introduced invalid workflow YAML because heredoc contents were not indented under run: |.