[submodule] Update submodule sonic-gnmi to the latest HEAD automatica…

…lly (#18724)

#### Why I did it
src/sonic-gnmi
```
* d0ec8b0 - (HEAD -> master, origin/master, origin/HEAD) Merge pull request #216 from ranjinidn/sonic-gnmi_bookworm_migration (30 hours ago) [Saikrishna Arcot]
|\ 
| failure_prs.log 8e3f408 - Merge branch 'master' into sonic-gnmi_bookworm_migration (6 days ago) [ranjinidn]
| |\ 
| |/ 
|/| 
* | 3363587 - Support control character in config (#217) (8 days ago) [ganglv]
 / 
* 505bfc2 - bookworm migration of sonic-gnmi azure pipeline and go version updation for sonic-gnmi repo (10 days ago) [ranjinidn]
```
#### How I did it
#### How to verify it
#### Description for the changelog