[submodule]: update sonic-utilities (#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 (#1657)
0d53b7a [sonic_installer] don't print errors when installing an image not supporting app ext (#1719)
394e2fb Implement script null_route_helper (#1737)
```

Signed-off-by: bingwang <bingwang@microsoft.com>
This commit is contained in:
bingwang-ms 2021-08-06 10:04:39 +08:00 committed by GitHub
parent dc296bf135
commit 948ba5bd08
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@ -1 +1 @@
Subproject commit dd01b5600994b3e51ba46ab06c96d58ae4fb30dd
Subproject commit 54b74a24b78d52af5f758216e74c4ed74db740e5