[submodule] Update submodule dhcprelay to the latest HEAD automatically (#16566)

#### Why I did it
src/dhcprelay
```
* 2b33d76 - (HEAD -> master, origin/master, origin/HEAD) dhcpv6 per interface counter support (#43) (7 days ago) [jcaiMR]
```
#### How I did it
#### How to verify it
#### Description for the changelog
This commit is contained in:
mssonicbld 2023-09-21 16:33:29 +08:00 committed by GitHub
parent 3136251d6b
commit 53d8a9b5b2
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23

@ -1 +1 @@
Subproject commit 6a6ce245125d600ad07fc02638e96ba6c18d1b4b
Subproject commit 2b33d76dbac69d3d9ad9e9f2d37252db525f07b9