In contents tab, links are displayed instead of the headers

For example, if a header is set to `[PHP](https://mateishome.page)`, then `(https://mateishome.page)` will display in the contents tab instead of `PHP`.

<img src="https://github.com/user-attachments/assets/5e642d40-f681-4f45-8e7c-b9d6e4d2e56b" height=500px>
<img src="https://github.com/user-attachments/assets/39b9d2e1-10df-49fa-84e1-359788dd94c2" height=300px>