Update python/HOC2023/scene4.md

Author: neonerz

python/HOC2023/scene4.md

@@ -7,6 +7,13 @@
 
 We've discovered a significant problem with the door lock system. Right now, anyone can see the event logs, which is a big privacy and security concern. To fix this issue, we need to update the code so that only administrators have access to the event logs.
 
+The `permission_group()` function takes one parameter which defines which permission group it's being compared to.
+
+Valid permission groups are: 
+- `anyone`
+- `user`
+- `admin`
+
 ```python
 
 agent.move(RIGHT, 1)