package/pv: bump to version 1.9.0
For release note, see:
https://codeberg.org/a-j-wood/pv/src/tag/v1.9.0/docs/NEWS.md
This commit also updates the PV_SITE url from http to https, to
follow the download url published on the home page:
https://www.ivarch.com/programs/pv.shtml
Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>