Add Chris to Gehlenborg Lab members (#203)
Add Chris to Gehlenborg Lab members (#203)

* Add Chris to Gehlenborg Lab members

...

* Change the missing photo name to placeholder.png

* Changed to `staff` to be appeared in the website

Co-authored-by: Sehi L'Yi <5815f3a9cd58ee59a8c97e5637b0da43772e54b9@hms.harvard.edu>
hms-dbmi/gehlenborglab-website,hms-dbmi/gehlenborglab-website,hms-dbmi/gehlenborglab-website