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

…D automatically (#17209)

#### Why I did it
src/sonic-platform-daemons
```
* 55a6828 - (HEAD -> master, origin/master, origin/HEAD) Update the code coverage rate to 80% (#406) (16 hours ago) [xumia]
```
#### How I did it
#### How to verify it
#### Description for the changelog