added sayma as a member

Author: fraolBatole

_data/members.yml

@@ -10,6 +10,11 @@
   img: hrajan.jpg
 
 # Postdocs:
+- name: Dr. Sayma Sultana
+  status: Postdoctoral Fellow
+  email: Ssultana1@tulane.edu
+  site: https://sayma23.github.io/
+  img: sayma.png
 
 # PhD Candidates: