This is needed following the bump of libyang (3.12.2),
sysrepo (3.6.11) and libnetconf2 (3.7.1), as netopeer2 2.4.1 is the
version designed to work with those other components.
See https://github.com/CESNET/netopeer2/releases for the changes.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>