Make sure that you've got the latest caracal and caracal_docs in the same parent directory.
Go into the caracal_docs directory and type the following (having installed some python modules to be listed here soon):
python make_caracal_docs.py
cd sphinx
make html
cd ../
Then commit and push your changes to this repository.
And you're done! The readthedocs page https://caracal.readthedocs.io will be updated automatically.