text: Title: Docs: bad links in flask migration docs
  Body: ### Summary
  
  https://docs.litestar.dev/latest/migration/flask.html
  
  <img width="936" alt="image" src="https://github.com/litestar-org/litestar/assets/45884264/e0b452be-8b6e-4b0f-96e1-6c66a81322a3">