[submodule] update sonic-utilities submodule

- Fix to make alias 'key' as optional atrribute in config/show commands (sonic-net#405)
- [warm reboot] provide option to reboot with "kexec -e" (sonic-net#406)
- Fix for failed arp entries, minor display modification (sonic-net#404)

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