Invalid choice parameter example in the core.md file

[Irynei]

There is a small typo in the example of choice parameters in the core.md document. ChoiceParameter didn't have value param, instead, it is called values.

Currently:

choice_param = ChoiceParameter(name="y", parameter_type=ParameterType.STRING, value=["foo", "bar"])

Should be:

choice_param = ChoiceParameter(name="y", parameter_type=ParameterType.STRING, values=["foo", "bar"])

[kkashin]

Thanks for identifying that - will be fixed shortly: #92

[ldworkin]

Closing, since this should be in our current release (0.1.2)