docs(aio): updating about page for team changes (#19003)

PR Close #19003

aio/content/marketing/contributors.json

@@ -80,15 +80,6 @@
    "group": "Angular"
  },
 
- "aaronzhang": {
-   "name": "Aaron Zhang (章小飞)",
-   "picture": "xiaofei.jpg",
-   "twitter": "",
-   "website": "http://github.com/damoqiongqiu",
-   "bio": "Aaron is Angular's developer PM in China. He is the lead for angular.cn and social channels in China, and helps developers in China's enterprise and open source communities to be successful with Angular. One of the earliest Angular developers in China since Angular 2012, he translated the first books on Angular into Chinese. Aaron joined the Google team in 2016.",
-   "group": "Angular"
- },
-
  "tobias": {
    "name": "Tobias Bosch",
    "picture": "tobias.jpg",