x11-wm/pekwm - update WWW

Worth nothing is that the .org page has been taken over by some dubious hoster
claiming pekwm has VPS support!? and links to hostingsonar.com (broken), this
will be replaced with the .se domain pekwm.se. The official pekwm page
currently is the Github page https://github.com/pekdon/pekwm.

Information taken from https://pekdon.github.io/posts/pekwm-development-reboot/

PR: 254443
Reported by: Herbert J. Skuhra <herbert@mailbox.org>
Approved by: Natacha Porté <natbsd@instinctive.eu> (maintainer)