[submodule] Update submodule sonic-utilities to the latest HEAD automatically (#18078)

#### Why I did it
src/sonic-utilities
```
* 81c5349 - (HEAD -> master, origin/master, origin/HEAD) [chassis] fix show bgp summary when no neighbors are present on one ASIC (#3158) (10 hours ago) [Arvindsrinivasan Lakshmi Narasimhan]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld