[submodule] Update submodule sonic-host-services to the latest HEAD a…

…utomatically (sonic-net#19665)

#### Why I did it
src/sonic-host-services
```
* ca6b3cd - (HEAD -> master, origin/master, origin/HEAD) Fix security vulnerability in caclmgrd (#139) (5 days ago) [Zhaohui Sun]
```
#### How I did it
#### How to verify it
#### Description for the changelog