Fix docs build

[wtbarnes]

Fix docs build that was failing on warning about references to unit annotations not being found.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.92%. Comparing base (90e9c5a) to head (f4adb5a).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #136   +/-   ##
=======================================
  Coverage   81.92%   81.92%           
=======================================
  Files          11       11           
  Lines         354      354           
=======================================
  Hits          290      290           
  Misses         64       64           

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