getrlimitusage.2: Update HISTORY section

Add 14.2, as this was cherry-picked prior to release.

Reported by:	Harald Eilertsen
Reviewed by:	kib
Sponsored by:	The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D53320

lib/libsys/getrlimitusage.2

@@ -25,7 +25,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd September 27, 2024
+.Dd October 24, 2025
 .Dt GETRLIMITUSAGE 2
 .Os
 .Sh NAME
@@ -97,4 +97,4 @@ and
 The
 .Fn getrlimitusage
 system call appeared in
-.Bx 15.0 .
+.Fx 14.2 .