units: fix typo

vrutkovs> zbyszek:
http://cgit.freedesktop.org/systemd/systemd/diff/units/systemd-journal-upload.service.in?id=ad95fd1d2b9c6344864857c2ba7634fd87753f8e - typo in Group name
networkd: fix colud typo

sztanpet> if your already there, might fixing "Colud" to Could in 53af3b7