[3.14] Update outdated statement from `math` about C standard (GH-134621) (#134825)

Update outdated statement from `math` about C standard (GH-134621)
(cherry picked from commit 21672b694bd1786bad6eb71a9eff89291a91554b)

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Co-authored-by: Adam Turner <9087854+aa-turner@users.noreply.github.com>