Fix Sphinx warnings.

Author: serhiy-storchaka

Misc/NEWS.d/next/Library/2026-03-15-16-38-48.gh-issue-145980.mRze5H.rst

@@ -1,5 +1,5 @@
 Added the *alphabet* parameter in :func:`~binascii.b2a_base64`,
 :func:`~binascii.a2b_base64`, :func:`~binascii.b2a_base85` and
 :func:`~binascii.a2b_base85` and a number of ``*_ALPHABET`` constants in the
-:mod:`binascii` module. Removed :func:`~binascii.b2a_z85` and
-:func:`~binascii.a2b_z85`.
+:mod:`binascii` module. Removed :func:`!b2a_z85` and
+:func:`!a2b_z85`.