[swss][utilities] advance sub module head (#3010)

Submodule src/sonic-utilities 46b5aa8..5b73b83:
  > [intfutil] Fix error when <interface name> specified in show interface related commands (#548)

Submodule src/sonic-swss a637562..93497ec:
  > [orchagent] PFC WD support for BFN platform (#916)

Signed-off-by: Ying Xie <ying.xie@microsoft.com>