Fixed PG loader JobConfig typo

Author: viragtripathi

connectors/postgres/demo/config/samples/loader/JobConfig.yml

@@ -17,7 +17,7 @@ pipelineConfig:
     HashWriteStage:
       handlerId: REDIS_HASH_WRITER
       connectionId: targetConnection
-      metricEnabled: false
+      metricsEnabled: false
       prependTableNameToKeys: true
       deleteOnKeyUpdate: true
       async: true