libc: fix history for strverscmp(3) and versionsort(3)

strverscmp(3) and versionsort(3) where first released in 13.2

PR:		273401
Reviewed by:	kib
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D41617

lib/libc/gen/scandir.3

@@ -27,7 +27,7 @@
 .\"
 .\"     @(#)scandir.3	8.1 (Berkeley) 6/4/93
 .\"
-.Dd August 23, 2022
+.Dd August 31, 2023
 .Dt SCANDIR 3
 .Os
 .Sh NAME
@@ -189,4 +189,4 @@ and
 .Fn
 versionsort
 functions were added in
-.Fx 14.0 .
+.Fx 13.2 .

lib/libc/string/strverscmp.3

@@ -1,6 +1,6 @@
 .\" SPDX-License-Identifier: BSD-2-Clause
 .\" Copyright (c) 2022 Aymeric Wibo <obiwac@gmail.com>
-.Dd July 11, 2022
+.Dd August 31, 2023
 .Dt STRVERSCMP 3
 .Os
 .Sh NAME
@@ -53,4 +53,4 @@ function is a GNU extension and conforms to no standard.
 The
 .Fn strverscmp
 function was added in
-.Fx 14.0 .
+.Fx 13.2 .