DOCSP-15041 Advise users to not use PII inside their Storage Configs (#141)

* DOCSP-15041 Advise users to not use PII inside their Storage Configs

* DOCSP-15041 updates for copy review feedback

Author: kanchana-mongodb

source/reference/format/data-lake-configuration.txt

@@ -25,6 +25,14 @@ supports |s3| buckets, |service| clusters, and publicly accessible
 {+dl+} to your |s3| bucket, |service| cluster, and |http| 
 {+data-lake-stores+} to run queries against your data.
 
+.. important:: 
+
+   Information in your storage configuration is visible internally at 
+   MongoDB and stored as operational data to monitor and improve the 
+   performance of {+adl+}. So, we recommend that you do not use 
+   :abbr:`PII (Personally Identifiable Information)` in your 
+   configurations.
+
 Example Configuration for Individual Data Stores 
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~