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

…ly (sonic-net#15545)

#### Why I did it
src/dhcprelay
```
* c36b8e3 - (HEAD -> master, origin/master, origin/HEAD) [actions] Support Semgrep by Github Actions (#39) (7 hours ago) [Mai Bui]
```
#### How I did it
#### How to verify it
#### Description for the changelog