[submodule] Update submodule sonic-platform-common to the latest HEAD automatically (#21064)

#### Why I did it
src/sonic-platform-common
```
* ca6ab94 - (HEAD -> 202311, origin/202311) Implement get/set_lpmode API for SFF8472 (#512) (22 hours ago) [byu343]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld