Fix generated docs on readthedocs
#43 (closed) worked fine locally, but on https://soong-etl.readthedocs.io/en/latest/ not so much. Locally
nav:
- Introduction:
- index.md
- example.md
- API Reference:
- 'API Reference': api/html/index.html
works as expected, linking to http://127.0.0.1:8000/api/html/index.html. On readthedocs, however, it instead links directly to api/index.md, and the relative links within that file omit the html
directory.