Update modules/ROOT/pages/authentication-authorization/immutable-roles-privileges.adoc

Co-authored-by: Phil Wright <[email protected]>

Author: renetapopova

modules/ROOT/pages/authentication-authorization/immutable-roles-privileges.adoc

@@ -8,7 +8,8 @@
 Immutable roles are available starting with Neo4j 5.26.
 ====
 
-Immutable privileges and roles are useful for restricting the actions of users who can themselves administer  xref:authentication-authorization/dbms-administration.adoc#access-control-dbms-administration-role-management[roles] xref:authentication-authorization/dbms-administration.adoc#access-control-dbms-administration-privilege-management[privileges].
+Immutable privileges are useful for restricting the actions of users who can themselves administer xref:authentication-authorization/dbms-administration.adoc#access-control-dbms-administration-privilege-management[privileges]. 
+Immutable roles are useful for providing _system roles_, which appear as permanent parts of the DBMS.
 
 
 [CAUTION]