[submodule] update sonic-snmpagent pointer (#10461)

890f32f  LLDPLocalSystemDataUpdater Exception Log Handled (#249)
2151731 Handle error seen on system where vlan interface map is not present (#246)
c6141c7 [build] use Azure.sonic-buildimage.official.vs pipeline as artifact source (#248)

Signed-off-by: Vivek Reddy Karri <vkarri@nvidia.com>