Add changelog entry

CHANGELOG

@@ -12,6 +12,7 @@ v 8.7.0 (unreleased)
   - Project switcher uses new dropdown styling
   - Load award emoji images separately unless opening the full picker. Saves several hundred KBs of data for most pages. (Connor Shea)
   - Do not include award_emojis in issue and merge_request comment_count !3610 (Lucas Charles)
+  - Restrict user profiles when public visibility level is restricted.
   - All images in discussions and wikis now link to their source files !3464 (Connor Shea).
   - Return status code 303 after a branch DELETE operation to avoid project deletion (Stan Hu)
   - Add setting for customizing the list of trusted proxies !3524

lib/api/users.rb

@@ -40,7 +40,7 @@ module API
       get ":id" do
         @user = User.find(params[:id])
 
-        if current_user.present? && current_user.is_admin?
+        if current_user && current_user.is_admin?
           present @user, with: Entities::UserFull
         elsif can?(current_user, :read_user, @user)
           present @user, with: Entities::User