[submodule] Update submodule sonic-linux-kernel to the latest HEAD automatically (sonic-net#19073)

#### Why I did it
src/sonic-linux-kernel
```
* 9770e13 - (HEAD -> master, origin/master, origin/HEAD) Add patch of SONiC Linux kernel DTS file to support Supermicro SSE-G3748 board. (sonic-net#394) (27 hours ago) [Erich Yen]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld