Fix RTD

[astrojuanlu]

This will hopefully unblock a few outstanding PRs.

[astrojuanlu]

See

https://h11--177.org.readthedocs.build/en/177/basic-usage.html#http-basics

vs

https://h11.readthedocs.io/en/latest/basic-usage.html#http-basics

for an example. Not pixel perfect, but it's there.

[tomchristie]

Thanks. What's the context / where did this become broken?

[rffontenelle]

The configuration file is mandatory in Read The Docs as of September 25, 2023. See https://blog.readthedocs.com/migrate-configuration-v2/

Quoting the first paragraph:

We are announcing a new requirement for all builds to use our configuration file version 2. This announcement deprecates builds without a configuration file, as well as version 1 of our configuration file.