issue with code highlighting within Copilot

**Steps to reproduce**
- Create/Enter a Copilot Conversation
- ask copilot for any code snippet

**Result**
a random highlighting error is occurred as appearing in screenshots below

![Image](https://github.com/user-attachments/assets/115e1365-1c0d-4d99-982f-cc1fd9b8818f)

![Image](https://github.com/user-attachments/assets/11f2efaf-9ddd-4188-96e5-df78d4638280)