Update group names to lldap convention: parking_admins, managers

README.md

@@ -107,9 +107,9 @@ When `AUTHELIA_ENABLED=true`, the app trusts Authelia headers:
 - `Remote-Name`: Display name
 - `Remote-Groups`: Comma-separated group list
 
-Group mapping:
-- `parking-admins` → admin role
-- `parking-managers` → manager role
+Group mapping (follows lldap naming convention):
+- `parking_admins` → admin role
+- `managers` → manager role
 - Others → employee role
 
 ## User Roles