text: Title: ReadTheDocs needs updating
  Body: Thanks for your error report and we appreciate it a lot.
  
  **Checklist**
  
  1. I have searched related issues but cannot get the expected help.
  2. I have read the [FAQ documentation](https://mmdetection.readthedocs.io/en/latest/faq.html) but cannot get the expected help.
  3. The bug has not been fixed in the latest version.
  
  **Describe the bug**
  Some readthedocs sections are not populating in v3. Have to use v2.28 or earlier.
  Additionally, https://mmdetection.readthedocs.io/en/latest/faq.html in the issue template is not found.
  
  **Reproduction**
  ![image](https://github.com/user-attachments/assets/c038bf9c-c286-4eaa-b6b1-5c2451092f7a)
  
  
  1. What command or script did you run?
  
  ```
  https://mmdetection.readthedocs.io/en/latest/api.html
  ```