fix for pkgdown forcing ANSI colors, which it can't render with comment=NA

[jgabry]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.50%. Comparing base (b22ea49) to head (36fe24a).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #406   +/-   ##
=======================================
  Coverage   92.50%   92.50%           
=======================================
  Files          31       31           
  Lines        3107     3107           
=======================================
  Hits         2874     2874           
  Misses        233      233           

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[github-actions]

This is how benchmark results would change (along with a 95% confidence interval in relative change) if 36fe24a is merged into master:

• ✔️loo_function: 1.88s -> 1.88s [-0.53%, +0.32%]
• ✔️loo_matrix: 1.67s -> 1.67s [-1%, +1.13%]
  Further explanation regarding interpretation and methodology can be found in the documentation.