[submodule] Update submodule sonic-utilities to the latest HEAD automatically (sonic-net#22232)

#### Why I did it
src/sonic-utilities
```
* a6fcf564 - (HEAD -> 202411, origin/202411) [show][interfaces] Add proposal for show interfaces flap (sonic-net#3627) (sonic-net#3823) (8 hours ago) [vdahiya12]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld