[sonic-utilities] Update submodule (#6777)

Commits include:

* src/sonic-utilities c7e46c9...42cab68 (3):
  > [consutil] Look for udevprefix.conf file under platform dir, not plugins (#1431)
  > [ci]: download from sonic-buildimage.vs artifact (#1428)
  > [storyteller] sort output by time and improve lag support (#1430)