docs: Correct action descriptions to reflect actual purpose (#46931)

Thanks @injust for pointing this out. It seems a few other action docs
were also copied from elsewhere and weren't updated to reflect their
actual purpose. This PR fixes those, though I may not have covered all
of them.

Closes #46832

Release Notes:

- N/A

---------

Co-authored-by: Kunall Banerjee <hey@kimchiii.space>
05a021c4a3Xin Zhao committed on 1/28/2026, 11:10:25 PM· committed by GitHubparent483e64a
5 files changedLine totals unavailable