DOC-1850 fix rpk security role nesting in reference (#1504)

Author: micheleRP

modules/ROOT/nav.adoc

@@ -463,13 +463,13 @@
 ***** xref:reference:rpk/rpk-security/rpk-security-acl-create.adoc[]
 ***** xref:reference:rpk/rpk-security/rpk-security-acl-delete.adoc[]
 ***** xref:reference:rpk/rpk-security/rpk-security-acl-list.adoc[]
-**** xref:reference:rpk/rpk-security/rpk-security-role-assign.adoc[]
-**** xref:reference:rpk/rpk-security/rpk-security-role-create.adoc[]
-**** xref:reference:rpk/rpk-security/rpk-security-role-delete.adoc[]
-**** xref:reference:rpk/rpk-security/rpk-security-role-describe.adoc[]
-**** xref:reference:rpk/rpk-security/rpk-security-role-list.adoc[]
-**** xref:reference:rpk/rpk-security/rpk-security-role-unassign.adoc[]
 **** xref:reference:rpk/rpk-security/rpk-security-role.adoc[]
+***** xref:reference:rpk/rpk-security/rpk-security-role-assign.adoc[]
+***** xref:reference:rpk/rpk-security/rpk-security-role-create.adoc[]
+***** xref:reference:rpk/rpk-security/rpk-security-role-delete.adoc[]
+***** xref:reference:rpk/rpk-security/rpk-security-role-describe.adoc[]
+***** xref:reference:rpk/rpk-security/rpk-security-role-list.adoc[]
+***** xref:reference:rpk/rpk-security/rpk-security-role-unassign.adoc[]
 **** xref:reference:rpk/rpk-security/rpk-security-user.adoc[]
 ***** xref:reference:rpk/rpk-security/rpk-security-user-create.adoc[]
 ***** xref:reference:rpk/rpk-security/rpk-security-user-delete.adoc[]