Uncertainty quantification tutorial (#1225)

* combined quantile regression and conformal regression

* spell check

* re-run and updated performance metric description

* grammar check

* Update uncertainty_combined.ipynb

* Rename uncertainty_combined.ipynb to uncertainty_quantification.ipynb

* Update uncertainty_quantification.ipynb

* Update uncertainty_quantification.ipynb

* Update uncertainty_quantification.ipynb

* Update uncertainty_quantification.ipynb

* Update uncertainty_quantification.ipynb

* Update uncertainty_quantification.ipynb

* Update uncertainty_quantification.ipynb

---------

Co-authored-by: Kevin Chen <[email protected]>
Co-authored-by: leoniewgnr <[email protected]>