[DOCS] Malformed <details> nesting in FAQ section of README.md

What is the type of issue?

Something else

What is the issue?

The FAQ section in README.md has improperly nested <details> tags which causes rendering issues in Markdown viewers like GitHub.

Problem snippet:

```.md
<details>
<details>
<summary>Which models are supported?</summary>
...
</details>

**ScreenShot**
<img width="876" alt="Image" src="https://github.com/user-attachments/assets/5332492d-321e-423f-af26-d9840ab3094d" />

### Where did you find it?

_No response_