Explicitly request systemd-networkd installation

The instructions worked for me as-is on Fedora 40 but just this week on a fresh Fedora 41 server installation I bumped into this step failing (I performed all earlier steps, including installing dracut-network): # dracut -f -v dracut[I]: Executing: /usr/bin/dracut -f -v dracut[E]: Module 'systemd-networkd' cannot be installed. That happened because systemd-networkd wasn't installed by default and nothing pulled it as its dependency. I'm not entirely sure if this is a Fedora 40/Fedora 41 difference or something. After installing systemd-networkd I was able to finish the process successfully.