wp-uninstalled: default to wireplumber if no args are given

Runing wp-uninstalled.sh without arguments (like pw-uninstalled.sh),
just execs itself into nothingness which seems like a waste of effort.
Let's default to running wireplumber when no arguments are given.
6 jobs for wip/uninstalled-wp in 1 minute and 58 seconds (queued for 6 seconds)
latest
Status Name Job ID Coverage
  Container
passed container_fedora #14653571

00:00:29

passed container_ubuntu #14653572

00:00:28

 
  Build
passed build_on_fedora_no_docs #14653574

00:00:40

passed build_on_fedora_with_docs #14653573

00:00:48

passed build_on_ubuntu_no_gir #14653576

00:01:05

passed build_on_ubuntu_with_gir #14653575

00:01:25