package/tor: bump version to 0.4.8.15
Release notes:
https://gitlab.torproject.org/tpo/core/tor/-/raw/release-0.4.8/ReleaseNotes
https://forum.torproject.org/t/stable-release-0-4-8-15/17998
Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Julien Olivain <ju.o@free.fr>
(cherry picked from commit f9a02e7b80b24c3f71e69f149169fac556c6a63e)
Signed-off-by: Thomas Perale <thomas.perale@mind.be>