Update API description for Credential Management

Clarified the description of the Credential Management REST API to specify that it deals with credentials enrolled by end-users.

Author: NipuniBhagya

en/identity-server/7.2.0/docs/apis/restapis/end-user-credential-management.yaml

@@ -1,8 +1,8 @@
 openapi: 3.0.0
 info:
   description: |
-    The Credential Management REST API provides a comprehensive interface to list and delete enrolled 
-    credentials within the WSO2 Identity Server. The administrators who are assigned with privileges to list and delete
+    The Credential Management REST API provides a comprehensive interface to list and delete 
+    credentials enrolled by end-users within the WSO2 Identity Server. The administrators who are assigned with privileges to list and delete
     users (with scopes internal_user_mgt_view and internal_user_mgt_delete) are able to perform these operations.
     
     <b>Note</b>: This API is available only in WSO2 Identity Server 7.2.0, beginning with update level 5