Github usually updates their actions once a while and then warns about a
node env getting deprecated in runs. Which is not super easily spotted
by a developer until it's too late, so let's like npm let dependabot
handle updating.
So far the daily updates tend to run in our mornings between 7:00 and
8:00, which blocks our CI for a long time, and thus collides with
developers sending PRs. Move them to the evening instead, when they can
use the quiet bots time.
Also reduce the number of parallel PRs from 5 to 3. Parallel ones always
need to be rebased, and thus are very expensive. We still want to be
able to have a complicated PatternFly PR open for several days without
blocking other updates.
