add name to team

docs/About-Us.md

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 The cBioPortal for Cancer Genomics was originally developed at [Memorial Sloan Kettering Cancer Center](https://www.mskcc.org/) (MSK). The [public cBioPortal site](https://www.cbioportal.org) is hosted by the [Center for Molecular Oncology](https://www.mskcc.org/research/molecular-oncology) at MSK. The cBioPortal software is now available under an open source license via [GitHub](https://github.com/cBioPortal/). The software is now developed and maintained by a multi-institutional team, consisting of MSK, the Dana Farber Cancer Institute, Princess Margaret Cancer Centre in Toronto, Children's Hospital of Philadelphia, Caris Life Sciences, [The Hyve](https://thehyve.nl) and [SE4BIO](https://www.se4.bio/) in the Netherlands, and Bilkent University in Ankara, Turkey.
 
 ## Memorial Sloan Kettering Cancer Center
+* [Zain Nasir](https://www.zainnasir.com/)
 * Benjamin Gross
 * S Onur Sumer
 * Hongxin Zhang