Docs: bad links in flask migration docs

[JacobCoffee]

Summary

https://docs.litestar.dev/latest/migration/flask.html

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[l-armstrong]

I'm looking to take on this issue. I do have a question.
Is it that the document should not have something like:Body <usage/4-request-data/#specifying-a-content-type>_?

and should instead render something of the form request.get_json, request.headers, etc. ?

[JacobCoffee]

Those links inside <...> have changed or something - So finding where they are supposed to be will just be a bit of digging. like the first one,

request.files
Use `UploadFile <usage/4-request-data/#file-uploads>`_

Should probably be pointing to https://docs.litestar.dev/2/usage/requests.html#file-uploads which would be something like UploadFile <usage/requests/file-uploads>`_ instead, and the same for the others:

request.form
request.form(), prefer `Body <usage/4-request-data/#specifying-a-content-type>`_

request.get_json
request.json(), prefer the `data keyword argument <usage/4-request-data/#request-body>`_

And they would all just be hyperlinks to their respective sections