Update link in resilience_options.py

[beckykd]

The link in measure_mitgation pointed to measure_noise_learning

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Fixes #

[jyu00]

@beckykd the text is meant to say that you can use measure_mitigation to enable measurement mitigation, and if you want to fine tune that, you can use the suboptions under measure_noise_learning.

Having said that, linking to :attr:~measure_noise_learning is not very helpful. In the API doc, if I click on that link, it just brings me to the measure_noise_learning attribute. It'd be more useful if it says something like

If you enable measurement mitigation, you can fine tune its noise learning using :attr:`~measure_noise_learning`. 
See :class:`MeasureNoiseLearningOptions` for all measurement mitigation noise learning options.

[beckykd]

Having said that, linking to :attr:~measure_noise_learning is not very helpful. In the API doc, if I click on that link, it just brings me to the measure_noise_learning attribute. It'd be more useful if it says something like

I totally agree that linking to that attribute isn't helpful - especially since it's just a boolean value. I did it like that to match the rest of the page. Should we also update zne_mitigation then? Maybe just delete the sentence about further options; or change it to something useful?

[jyu00]

Should we also update zne_mitigation then?

Yeah I think that'd be the most useful and consistent way.