[submodule] Update submodule sonic-utilities to the latest HEAD automatically (sonic-net#21898)

#### Why I did it
src/sonic-utilities
```
* 940ed0dd - (HEAD -> master, origin/master, origin/HEAD) Fix command docker ps showing issue. (sonic-net#3791) (16 minutes ago) [Liu Shilong]
* a8ec74dd - Add namespace support for show interface neighbor expected (sonic-net#3781) (19 hours ago) [Austin (Thang Pham)]
* 8fdea8db - Fix the interface name length validation for subinterface (sonic-net#3774) (2 days ago) [Sudharsan Dhamal Gopalarathnam]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld