text: Title: Link at main doc page is pointing to non-existent page
  Body: The "Edit on GitHub" button on the top of [main doc](https://docs.pandas-ai.com/en/latest/) is pointing to a non-existent page
  
  ![2023-10-21_20h09_13](https://github.com/gventuri/pandas-ai/assets/54143210/88e8cc80-0f81-425f-9f3d-62fda00b016e)
  
  Easy fix, just find the link and replace it by pointing to the main branch.
  
  