Replace goo.gl style link (#16373)

That URL shortening scheme should stop working soon [1], while we
don't really need it here.

1. https://developers.googleblog.com/en/google-url-shortener-links-will-no-longer-be-available/

Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Rob Norris <rob.norris@klarasystems.com>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>