[3.13] gh-96765: Update ConfigParser.read() docs with multi-file read example (GH-121664) (GH-121687)

(cherry picked from commit fc2178117538c161471711073887f34bcd464cc1)

Co-authored-by: Timon Viola <44016238+timonviola@users.noreply.github.com>
Co-authored-by: Ɓukasz Langa <lukasz@langa.pl>
1 file changed