DOC: list supported float dtypes I (#50738)

Author: natmokval

doc/source/user_guide/basics.rst

@@ -2068,6 +2068,8 @@ documentation sections for more on each type.
 |                                                 |                           |                    |                               | ``'Int64'``, ``'UInt8'``, ``'UInt16'``,|
 |                                                 |                           |                    |                               | ``'UInt32'``, ``'UInt64'``             |
 +-------------------------------------------------+---------------------------+--------------------+-------------------------------+----------------------------------------+
+| ``nullable float``                              | :class:`Float64Dtype`, ...| (none)             | :class:`arrays.FloatingArray` | ``'Float32'``, ``'Float64'``           |
++-------------------------------------------------+---------------------------+--------------------+-------------------------------+----------------------------------------+
 | :ref:`Strings <text>`                           | :class:`StringDtype`      | :class:`str`       | :class:`arrays.StringArray`   | ``'string'``                           |
 +-------------------------------------------------+---------------------------+--------------------+-------------------------------+----------------------------------------+
 | :ref:`Boolean (with NA) <api.arrays.bool>`      | :class:`BooleanDtype`     | :class:`bool`      | :class:`arrays.BooleanArray`  | ``'boolean'``                          |