[submodule] Update submodule sonic-snmpagent to the latest HEAD automatically (#17859)

#### Why I did it
src/sonic-snmpagent
```
* 2efaf2e - (HEAD -> 202305, origin/202305) Revert "[action] [PR:303] Fix SNMP dropping some of the queue counter when create_only_config_db_buffers is set to true (#303)" (#308) (4 minutes ago) [StormLiangMS]
```
#### How I did it
#### How to verify it
#### Description for the changelog
This commit is contained in:
mssonicbld 2024-01-20 04:32:37 +08:00 committed by GitHub
parent 306175be2c
commit 208c1705f5
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@ -1 +1 @@
Subproject commit b0a4bcc750abed449f08cfe0b8759e4f58f22816
Subproject commit 2efaf2e9529c11155e80e637213066b82223cc70