libc/timespec_get*.3: expose STANDARDS section

We now have .St -isoC-2023, so the STANDARDS section can go live.

Fixes:		9b5d724cad
MFC after:	1 week

lib/libc/gen/timespec_get.3

@@ -27,7 +27,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd August 21, 2023
+.Dd May 14, 2026
 .Dt TIMESPEC_GET 3
 .Os
 .Sh NAME
@@ -85,10 +85,10 @@ of
 .Dv TIME_UTC
 conforms to
 .St -isoC-2011 .
-.\" The
-.\" .Dv TIME_MONOTONIC
-.\" base conforms to
-.\" -isoC-2023 .
+The
+.Dv TIME_MONOTONIC
+base conforms to
+.St -isoC-2023 .
 .Sh HISTORY
 This interface first appeared in
 .Fx 12 .

lib/libc/gen/timespec_getres.3

@@ -3,7 +3,7 @@
 .\"
 .\" SPDX-License-Identifier: BSD-2-Clause
 .\"
-.Dd August 21, 2023
+.Dd May 14, 2026
 .Dt TIMESPEC_GETRES 3
 .Os
 .Sh NAME
@@ -36,11 +36,11 @@ if successful and zero otherwise.
 .Sh SEE ALSO
 .Xr clock_getres 2 ,
 .Xr timespec_get 3
-.\" .Sh STANDARDS
-.\" The
-.\" .Nm
-.\" function conforms to
-.\" .St -isoC-2023 .
+.Sh STANDARDS
+The
+.Nm
+function conforms to
+.St -isoC-2023 .
 .Sh HISTORY
 This interface first appeared in
 .Fx 14 .