[submodule] Update submodule sonic-utilities to the latest HEAD automatically (sonic-net#19586)

#### Why I did it
src/sonic-utilities
```
* b9a6049 - (HEAD -> master, origin/master, origin/HEAD) [Bug Fix] Fix disk check test and drops group test (sonic-net#3424) (28 hours ago) [Changrong Wu]
* c03c9c8 - Revert "fix: fix show bgp summary output typo" (sonic-net#3423) (2 days ago) [Jianquan Ye]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld