[submodule]: update sonic-utilities (sonic-net#8348)

This PR is to update sonic-utilities for master branch
Changes including
```
54b74a2 [LLDP] Fix lldpshow script to enable display multiple MAC addresses on the same remote physical interface (sonic-net#1657)
0d53b7a [sonic_installer] don't print errors when installing an image not supporting app ext (sonic-net#1719)
394e2fb Implement script null_route_helper (sonic-net#1737)
```

Signed-off-by: bingwang <bingwang@microsoft.com>