typo in extension setting: Plantuml: Export Include Folder Heirarchy

There is a typo in the setting Plantuml: Export Include Folder Heirarchy
The description is also spelled incorrectly -> please change to _**Hierarchy**_

<img width="875" height="118" alt="Image" src="https://github.com/user-attachments/assets/4a7e042a-8aa3-427f-a462-4b26a44a5bf6" />