[sonic-telemetry] Update the submodule sonic-telemetry. (#6132)

[dataset] Add dataset "system uptime" into non-db client. (#52)
Adding new data set to query Sonic OS version. (#50)
[gnmi_server] Disregard EOF status for STREAM subs (#48)

Signed-off-by: Yong Zhao <yozhao@microsoft.com>