Attempt to fix issues with sphinx-codeautolink

[btjanaka]

Description

sphinx-codeautolink is throwing several warnings during the documentation build -- here we try to fix these warnings.

Relevant issue: https://github.com/felix-hilden/sphinx-codeautolink/issues/96

Upgrading to Python 3.10 in ReadTheDocs seems to remove some of the errors, but there is still no auto linking in the examples. This seems to be a difficult issue, so we will settle for this.

TODO

• [x] Upgrade sphinx codeautolink
• [x] Upgrade ReadTheDocs python to 3.10

Questions

Status

• [x] I have read the guidelines in CONTRIBUTING.md
• [x] I have formatted my code using yapf
• [x] I have tested my code by running pytest
• [x] I have linted my code with pylint
• [x] I have added a one-line description of my change to the changelog in HISTORY.md
• [x] This PR is ready to go