Corrected docs

Author: derek-schaefer

README.rst

@@ -69,7 +69,7 @@ Add a ``JSONField`` to your model like any other field.
  - ``decoder``: Custom JSON decoder (default: ``json_field.fields.JSONDecoder``)
  - ``encoder_kwargs``: Specify all arguments to the encoder (overrides ``encoder``)
  - ``decoder_kwargs``: Specify all arguments to the decoder (overrides ``decoder``)
- - ``simple_formfield``: Restrict use of the ``datetime`` object in the form field
+ - ``simple_formfield``: Restrict use of the ``datetime`` module in the form field
 
 License
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