DOC: Incorrect mention of dtype_backend_option in convert_dtypes docstring

[paultiq]

Pandas version checks

• I have checked that the issue still exists on the latest versions of the docs on main here

Location of the documentation

https://pandas.pydata.org/docs/reference/api/pandas.DataFrame.convert_dtypes.html

Documentation problem

Documentation references features that didn't ship in 2.0.0 (they were in RC1): pd.set_option("mode.dtype_backend", "pyarrow")

New in version 2.0: The nullable dtype implementation can be configured by calling pd.set_option("mode.dtype_backend", "pandas") to use numpy-backed nullable dtypes or pd.set_option("mode.dtype_backend", "pyarrow") to use pyarrow-backed nullable dtypes (using pd.ArrowDtype).

Suggested fix for documentation

Remove or update reference to be consistent with https://pandas.pydata.org/docs/dev/whatsnew/v2.0.0.html.

Instead of the mode.dtype_backend, reference this from the release notes:

The following functions gained a new keyword dtype_backend (GH36712)

[datapythonista]

Thanks @paultiq, good catch. I opened #52399 to address it, do you mind having a look at it?

[datapythonista]

@paultiq in general we don't close the issues until the PR is merged. Actually, the PR will close the issue automatically when merged. :)

[paultiq]

Ah, thanks, didn't know etiquette. Looks good to me.