Site: Add Xiong Duan as PMC

Author: NobiGo

site/_data/contributors.yml

@@ -378,7 +378,7 @@
   githubId: NobiGo
   pronouns: he/him
   org: Hikvision
-  role: Committer
+  role: PMC
 - name: Yong Liu
   apacheId: jackylau
   githubId: liuyongvs