DOCSP-9965 very minor doc update

Author: kanchana-mongodb

source/includes/steps-data-lake-deploy.yaml

@@ -39,7 +39,7 @@ content: |
     :figwidth: 715px
     :alt: Screenshot of the {+data-lake-short+} S3 bucket configuration.
 ---
-title: "Create an |iam| user for |service| and assign the required policy."
+title: "Create an |iam| role for |service| and assign the required policy."
 level: 4
 ref: create-iam-user-data-lake
 content: |