[submodule] Update submodule dhcprelay to the latest HEAD automatical…

…ly (#17572)

#### Why I did it
src/dhcprelay
```
* 5ae186f - (HEAD -> master, origin/master, origin/HEAD) [counter] Clear counter table when init (#45) (10 hours ago) [Yaqiang Zhu]
```
#### How I did it
#### How to verify it
#### Description for the changelog