package/netopeer2: bump to version 2.4.5

This release depends on libyang (v3.13.6), libnetconf2 (v3.7.10) and
sysrepo (v3.7.11).

See https://github.com/CESNET/netopeer2/releases/tag/v2.4.5


for the changes.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
[Julien: change release notes link to point on exact release]
Signed-off-by: Julien Olivain <ju.o@free.fr>