Update Doc/whatsnew/3.15.rst

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

Author: vstinner

Doc/whatsnew/3.15.rst

@@ -212,11 +212,11 @@ For example::
     True
 
 The following standard library modules have been updated to accept
-:class:`frozendict`: :mod:`copy`, :mod:`decimal`, :mod:`json`, :mod:`marshal`,
+:class:`!frozendict`: :mod:`copy`, :mod:`decimal`, :mod:`json`, :mod:`marshal`,
 :mod:`pickle`, :mod:`pprint` and :mod:`xml.etree.ElementTree`.
 
-:func:`eval` and :func:`exec` accept :class:`frozendict` for *globals*, and
-:func:`type` accept :class:`frozendict` for *dict*.
+:func:`eval` and :func:`exec` accept :class:`!frozendict` for *globals*, and
+:func:`type` accepts :class:`!frozendict` for *dict*.
 
 .. seealso:: :pep:`814` for the full specification and rationale.