[Member] update position

Author: KihongHeo

_data/members.yml

@@ -1,7 +1,7 @@
 professor:
   - name: Kihong Heo
     name-korean: 허기홍
-    info: Assistant Professor
+    info: Associate Professor
     photo: kihong.jpg
     homepage: https://prosys.kaist.ac.kr/home/kihongheo
     email: [email protected]