Update Cosmos CODEOWNERS
Replacing and with new owners
/sdk/containerservice/ @samkreter @zqingqing1 @GaneshaThirumurthi
# PRLabel: %Cosmos
-/sdk/cosmos/ @southpolesteve @zfoster
+/sdk/cosmos/ @kushagraThapar @simorenoh @simplynaveen20 @xinlian12 @moderakh
# PRLabel: %Data Factory
/sdk/datafactory/ @hvermis
