[submodule] Update submodule sonic-gnmi to the latest HEAD automatically (#23750)

#### Why I did it
src/sonic-gnmi
```
* 8d1b029 - (HEAD -> master, origin/master, origin/HEAD) Add v2r mapping for Switch Packet Integrity Drop counter (#423) (10 hours ago) [Vineet Mittal]
* 4267aab - Downgrade Go to 1.19 for SONiC Bookworm FIPS compliance (#495) (5 days ago) [Dawei Huang]
* 56d0703 - Add dom and port options for SHOW client (#493) (8 days ago) [Yutong Zhang]
* 6c7432c - change the output fornat of show interface errors and show interface fec status to be list of dicts (#494) (8 days ago) [Changrong Wu]
* ee84ea0 - Fix ZMQ lost data when connection reset issue (#492) (9 days ago) [Hua Liu]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld