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

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