add module and update learn path

Author: riswinto

learn-pr/paths/purview-implement-retention/index.yml

@@ -25,7 +25,7 @@ products:
 subjects:
 - security
 modules:
-- learn-m365.m365-compliance-information-governance
+- learn.wwl.purview-understand-retention
 - learn.wwl.purview-implement-manage-retention
 trophy:
   uid: learn.wwl.purview-implement-retention.trophy

learn-pr/wwl-sci/purview-understand-retention/index.yml

@@ -15,8 +15,8 @@ summary: |
 abstract: |
   In this unit you learn how to:
   - Identify common use cases for applying retention
-  - Understand the differences between retention and data loss prevention
-  - Scope retention to specific users, locations, and content types
+  - Explain how retention supports data protection alongside tools like data loss prevention
+  - Apply retention settings to specific users, sites, or content types
   - Recognize what retention does and doesn't control
 prerequisites: |
   None