fnmatch docs: link to fnmatch.filter(), not builtins.filter() (#99819)

Author: matthewhughes934

Doc/library/fnmatch.rst

@@ -48,7 +48,7 @@ patterns.
 
 Also note that :func:`functools.lru_cache` with the *maxsize* of 32768 is used to
 cache the compiled regex patterns in the following functions: :func:`fnmatch`,
-:func:`fnmatchcase`, :func:`filter`.
+:func:`fnmatchcase`, :func:`.filter`.
 
 .. function:: fnmatch(filename, pattern)