[submodule] Update submodule sonic-linux-kernel to the latest HEAD automatically (#22290)

#### Why I did it
src/sonic-linux-kernel
```
* a89afbc - (HEAD -> 202411, origin/202411) [202411] Update to Linux 6.1.123 (Azure#459) (4 days ago) [Saikrishna Arcot]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld