[submodule] Update submodule sonic-utilities to the latest HEAD autom…

…atically (sonic-net#18672)

#### Why I did it
src/sonic-utilities
```
* a634b27a - (HEAD -> 202305, origin/202305) [graceful reboot] Add watchdog, add execution of pre_reboot_hook, fix --force flag bug (sonic-net#3191) (9 hours ago) [Vadym Hlushko]
```
#### How I did it
#### How to verify it
#### Description for the changelog