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 bd00112)

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

Doc/whatsnew/3.11.rst

@@ -523,14 +523,17 @@ Other CPython Implementation Changes
   is 4300 digits in string form.
 
 
+.. _whatsnew311-new-modules:
+
 New Modules
 ===========
 
-* A new module, :mod:`tomllib`, was added for parsing TOML.
+* :mod:`tomllib`: For parsing `TOML <https://toml.io/>`_.
+  See :pep:`680` for more details.
   (Contributed by Taneli Hukkinen in :issue:`40059`.)
 
-* :mod:`wsgiref.types`, containing WSGI-specific types for static type
-  checking, was added.
+* :mod:`wsgiref.types`:
+  :pep:`WSGI <3333>`-specific types for static type checking.
   (Contributed by Sebastian Rittau in :issue:`42012`.)