[submodule] Update submodule sonic-gnmi to the latest HEAD automatically (sonic-net#25241)

#### Why I did it
src/sonic-gnmi
```
* 803f624 - (HEAD -> master, origin/master, origin/HEAD) [ssw][ha] use ProducerStateTable for DASH_HA_ tables. (sonic-net#563) (6 days ago) [Jing Zhang]
* af32b5b - Support for OC-YANG target for dialout telemetry (sonic-net#558) (9 days ago) [Anukul Verma]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Signed-off-by: Xincun Li <[email protected]>

Author: mssonicbld