[3.12] gh-124194: Fix wrong issue number in What's New in Python 3.8 (GH-124195) (#124198)

gh-124194: Fix wrong issue number in What's New in Python 3.8 (GH-124195)
(cherry picked from commit d8c0fe1944ac41787e16fa60e608f56c8235e100)

Co-authored-by: Bradley Reynolds <bradley.reynolds@darbia.dev>
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>