add fei to _toc

Author: hinderling

_toc.yml

@@ -12,6 +12,7 @@ chapters:
   - file: members/profiles/MartinC
   - file: members/profiles/BoucharebO
   - file: members/profiles/DemeautisC
+  - file: members/profiles/XiaF
   - file: members/profiles/GuilbertT
   - file: members/profiles/TorroR
   - file: members/profiles/NorlinN