Update chang-yutong.md

Author: nicolaedrabcinski

_members/chang-yutong.md

@@ -9,7 +9,7 @@ email: yutongch@usc.edu
 linkedin: in/yutong-chang-0a502a1ba
 github: LizChang
 
-lab_member_years:
+lab_member_years: 2019 - 2021
 alma_mater: Master of Science, Pharmaceutical Sciences, USC Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences
 current_job_position: Currently Statistical Data Scientist at Pfizer
 ---