ps: Fix implementation to alias to gerrit show-queue

This command was meant to be show-queue, but a typo caused it
to be show-caches.  Fix the binding.

Change-Id: Ib6ae43f096ed84fb1be3d793fcb41c21ec65a5a5
Signed-off-by: Shawn O. Pearce <sop@google.com>
1 file changed