[submodule] Update submodule sonic-platform-daemons to the latest HEA…

…D automatically (#18614)

#### Why I did it
src/sonic-platform-daemons
```
* b5f838d - (HEAD -> master, origin/master, origin/HEAD) Fix intermittent build failure for test_SfpStateUpdateTask_task_run_stop (#461) (3 days ago) [mihirpat1]
```
#### How I did it
#### How to verify it
#### Description for the changelog