[3.14] GH-123299: Copyedit 3.14 What's New: New Features (GH-139543) (#139615)

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

Author: 3 people