Fix autoupdate CI job for exemplar

[ednolan]

Currently it keeps trying to delete the cookiecutter boilerplate:

- {% if not cookiecutter._generating_exemplar %}
-     # Beman Standard checking via beman-tidy
-   - repo: https://github.com/bemanproject/beman-tidy
-     rev: v0.3.1
-     hooks:
-     - id: beman-tidy
- 
- {% endif %}