Update a NEWS entry.

Author: serhiy-storchaka

Misc/NEWS.d/next/Core_and_Builtins/2025-07-28-17-01-05.gh-issue-88886.g4XFPb.rst

@@ -1,3 +1,4 @@
-The codecs lookup function now performs only minimal normalization of the
-encoding name before passing it to the search functions: all ASCII letters
-are converted to lower case, spaces are replaced with hyphens.
+The codecs lookup function now again performs only minimal normalization of
+the encoding name before passing it to the search functions: all ASCII
+letters are converted to lower case, spaces are replaced with hyphens.
+This restores the pre-Python 3.9 behavior.