Adjust documentation of permissions

[ci skip]

CHANGELOG

@@ -4,6 +4,7 @@ v 8.6.0 (unreleased)
   - Improve the formatting for the user page bio (Connor Shea)
   - Fix avatar stretching by providing a cropping feature (Johann Pardanaud)
   - Strip leading and trailing spaces in URL validator (evuez)
+  - Update documentation to reflect Guest role not being enforced on internal projects
 
 v 8.5.1
   - Fix group projects styles

doc/permissions/permissions.md

@@ -6,7 +6,7 @@ If a user is both in a project group and in the project itself, the highest perm
 
 If a user is a GitLab administrator they receive all permissions.
 
-On public projects the Guest role is not enforced.
+On public and internal projects the Guest role is not enforced.
 All users will be able to create issues, leave comments, and pull or download the project code.
 
 To add or import a user, you can follow the [project users and members