add code owner for AnomalyDetector
# PRLabel: %Cognitive - Metrics Advisor
/sdk/metricsadvisor/ @xiangyan99 @kristapratico
+# PRLabel: %Cognitive - Anomaly Detector
+/sdk/anomalydetector/ @conhua @mengaims @juaduan @moreOver0
+
# PRLabel: %Cognitive - Translator
/sdk/translation/ @kristapratico @mohamedshabanofficial
