Update DateTime.pod6

typo in href

Author: finanalyst

doc/Type/DateTime.pod6

@@ -265,7 +265,7 @@ Returns the L<Julian date|https://en.wikipedia.org/wiki/Julian_day> (JD) for the
     say DateTime.new('2021-12-24T12:23:00.43Z').julian-date; # OUTPUT: «2459573.0159772␤»
 
 The C<julian-date> starts at zero at the epoch of noon UTC on
-I<November 24, 4714 B.C.> on the L<proleptic|https://en.m.wikionary.org/wiki/proleptic> Gregorian calendar (the calendar
+I<November 24, 4714 B.C.> on the L<proleptic|https://en.m.wiktionary.org/wiki/proleptic> Gregorian calendar (the calendar
 in use in much of the world and in international commerce and travel). The JD
 is used in astronomy to define times of celestial objects transiting the
 Earth's Prime Meridian. For any instant, it is the sum of the number of whole days and