Update conf.py to fix build

[tpike3]

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.30%. Comparing base (ce501b6) to head (6c2a8db).
Report is 21 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #226      +/-   ##
==========================================
+ Coverage   78.21%   78.30%   +0.08%     
==========================================
  Files          10        9       -1     
  Lines         693      765      +72     
  Branches      151      173      +22     
==========================================
+ Hits          542      599      +57     
- Misses        127      131       +4     
- Partials       24       35      +11     

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[EwoutH]

I would really like Read the docs on PRs to be enabled on Mesa-geo to validate that these PRs solve the issue.

• https://docs.readthedocs.io/en/stable/guides/pull-requests.html

CC @wang-boyu

[EwoutH]

I hoped that it would trigger a build when pushed to the main branch, but it doesn't look like it did.

We really need @wang-boyu for this.