Update packages/aws/data_stream/emr_metrics/manifest.yml

Co-authored-by: Maurizio Branca <maurizio.branca@elastic.co>

Author: gpop63

packages/aws/data_stream/emr_metrics/manifest.yml

@@ -28,5 +28,6 @@ streams:
  multi: false
  required: false
  show_user: false
+ description: To address latency issues between certain AWS services and CloudWatch, specify a latency parameter to adjust the collection start time and end time in Metricbeat such as `15m`.
  title: AWS EMR metrics
  description: Collect AWS EMR metrics