Clarify severity options for app policies

Author: DeCohen

CloudAppSecurityDocs/app-governance-app-policies-manage.md

@@ -27,7 +27,7 @@ To change the configuration of a user defined app policy:
 For the **Edit policy** page, step through the pages and make the appropriate changes:
 
 - **Description**: Change the description to make it easier to understand the policy's purpose.
-- **Severity**
+- **Severity** : Change the severity for your app policy to low,medium or high. 
 - **Policy settings**: Change the set of apps to which the policy applies. You can also choose to use the existing conditions or modify the conditions
 - **Actions**: Change the autoremediation action for alerts generated by the policy.
 - **Status**: Change the policy status.