[Serverless][8.17] Cases subfeatures (#6288)

Author: nastasha-solomon

docs/cases/cases-req.asciidoc

@@ -54,7 +54,7 @@ once, which creates a user profile.
 | Give view-only access for cases
 a| **Read** for the *Security* feature and **All** for the *Cases* feature
 
-NOTE: You can customize the sub-feature privileges to allow access to deleting cases, deleting alerts and comments from cases, and viewing or editing case settings.
+NOTE: You can customize the sub-feature privileges to allow access to deleting cases, deleting alerts and comments from cases, viewing or editing case settings, adding case comments and attachments, and re-opening cases.   
 
 | Revoke all access to cases | **None** for the *Cases* feature under *Security*
 

docs/serverless/investigate/case-permissions.asciidoc

@@ -49,7 +49,7 @@ a| **Read** for the **Security** feature and **All** for the **Cases** feature
 
 [NOTE]
 ====
-You can customize the sub-feature privileges to allow access to deleting cases, deleting alerts and comments from cases, and viewing or editing case settings.
+You can customize the sub-feature privileges to allow access to deleting cases, deleting alerts and comments from cases, viewing or editing case settings, adding case comments and attachments, and re-opening cases. 
 ====
 
 | Revoke all access to cases