add fn_names_on_cran to README

[e-kotov]

No description provided.

[mpadge]

Thanks @e-kotov, once you've accepted that suggested change, we'll be good to merge

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.44%. Comparing base (c41ad99) to head (611b238).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #305   +/-   ##
=======================================
  Coverage   92.44%   92.44%           
=======================================
  Files          46       46           
  Lines        3483     3483           
=======================================
  Hits         3220     3220           
  Misses        263      263           

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