spec file: update NetworkManager post scriptlet
There is a mix of new /usr/lib/systemd/libsystemd-shared-239.so (systemd-libs rpm) and old /usr/bin/udevadm (systemd-udev rpm) on the system at the point NetworkManager's post scriptlet is run, what causes warning messages when updating NetworkManager's version. This commit fixes this.
Edited by Ana Cabral