[BUG] Typo in tutorial overview

**Describe the bug**
`vk::result::eSuccess` should be `vk::Result::eSuccess` in the API concepts section.

**Screenshots**
<img width="1047" height="70" alt="Image" src="https://github.com/user-attachments/assets/a6fec376-a64f-42de-892d-ac126a6a218a" />
<img width="587" height="310" alt="Image" src="https://github.com/user-attachments/assets/b142145d-c83f-499e-991b-da73b49f51b7" />