See https://docs.python-arango.com/en/main/specs.html
Whereas it should look like https://docs.python-arango.com/en/dev/specs.html

• The ReadTheDocs builds have been silently failing for some time now: https://readthedocs.org/projects/python-driver-for-arangodb/builds/
• Possibly related to the fact that the workflow is still using Python 3.7 (EOL in June)

ReadTheDocs has moved on to a different configuration setup, which requires all ReadTheDocs users to migrate:

Your builds will stop working soon! Configuration files will soon be required by projects, and will no longer be optional. Read our blog post to create one and ensure your project continues building successfully: https://blog.readthedocs.com/migrate-configuration-v2/ 

#271 attempts to address this issue