gh-95913: Copyedit/improve New Modules What's New section (GH-97721)

* Link TOML & WSGI in New Modules section, refine text & add ref label

* Further reformat new modules & add PEP link to tomllib
(cherry picked from commit bd00112a99af44c6ef82ee45b4072ec3bbc82fef)

Co-authored-by: C.A.M. Gerlach <CAM.Gerlach@Gerlach.CAM>