[3.14] gh-74598: document that fnmatch.filterfalse is affected by cache limitation (GH-136781) (#136782)

gh-74598: document that `fnmatch.filterfalse` is affected by cache limitation (GH-136781)
(cherry picked from commit 263e451)

Co-authored-by: Gergely Elias <gergely.elias@gmail.com>

Author: miss-islington

Doc/library/fnmatch.rst

@@ -53,7 +53,7 @@ a :class:`!str` filename, and vice-versa.
 
 Finally, note that :func:`functools.lru_cache` with a *maxsize* of 32768
 is used to cache the (typed) compiled regex patterns in the following
-functions: :func:`fnmatch`, :func:`fnmatchcase`, :func:`.filter`.
+functions: :func:`fnmatch`, :func:`fnmatchcase`, :func:`.filter`, :func:`.filterfalse`.
 
 
 .. function:: fnmatch(name, pat)