Correct avatar path

Author: meo2326cc

_data/footer.yml

@@ -47,5 +47,5 @@ staffs:
     github_id: snowmint
   - name: Cheng-Chin Chiang
     title: Website Frontend Engineer
-    avatar: /assets/images/chengchinchiang.jpg
+    avatar: /assets/images/cheng-chin.jpg
     github_id: meo2326cc