add PH to README

Author: tschaume

README.md

@@ -64,6 +64,7 @@ The [Crystal Toolkit Development Team](https://github.com/materialsproject/cryst
 * [Richard Tran](https://github.com/CifLord) for contributing plotly-powered Wulff shapes to pymatgen, which Crystal Toolkit uses
 * [Guy Moore](https://github.com/guymoore13) for contributing magnetic moment visualization
 * [Steve Zeltmann](https://github.com/sezelt) for contributing electron diffraction
+* [Patrick Huck](https://github.com/tschaume), releases, operations, bugfixes and POC for MP / MPContribs
 
 New contributors are welcome, please see our [Code of Conduct.](code-of-conduct.md) If you are a new contributor please modify this README in your Pull Request to add your name to the list.