[submodule] Update submodule sonic-gnmi to the latest HEAD automatically (#16743)

#### Why I did it
src/sonic-gnmi
```
* cbb7631 - (HEAD -> master, origin/master, origin/HEAD) Debug grpc to fetch subscribe preferences of a path (#130) (6 hours ago) [Sachin Holla]
* 099ff7c - Remove command to install libhiredis deb file (#151) (9 hours ago) [Saikrishna Arcot]
```
#### How I did it
#### How to verify it
#### Description for the changelog
This commit is contained in:
mssonicbld 2023-09-28 16:33:29 +08:00 committed by GitHub
parent b45ee0980b
commit 7a306ae7be
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23

@ -1 +1 @@
Subproject commit 6fd461ca396d39ffc677a5b06370e84d73e30f54
Subproject commit cbb763111e6355666c2d7c2dd1a90d5e9ae3935d