[submodule]: update sonic-telemetry submodule (sonic-net#7275)

1c3f75e (HEAD -> master, origin/master, origin/HEAD) pindown the version of github.com/openconfig/gnoi (zhenggen-xu#76)
33acd5b [ci]: setup proper azp (zhenggen-xu#75)
5d82051 [CI] Set up CI with Azure Pipelines (zhenggen-xu#72)
0688cdb Remove go get commands from Makefile to prevent go.mod file from chan… (zhenggen-xu#66)