[submodule] Update submodule sonic-utilities to the latest HEAD automatically (#16005)

#### Why I did it
src/sonic-utilities
```
* a56b11b - (HEAD -> master, origin/master, origin/HEAD) revert unit test tests/test_clear_tag (#2934) (10 hours ago) [Mai Bui]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld