SAMZA-1104; fix yarn security page link from index.html page
SAMZA-1104; fix yarn security page link from index.html page

Author: Chen Song <csong@appnexus.com>

Reviewers: Jagadish <jagadish@apache.org>

Closes #62 from garlicbulb-puzhuo/SAMZA-1104

abhishekshivanna/samza,bharathkk/samza,abhishekshivanna/samza,fredji97/samza,lhaiesp/samza,apache/samza,TiVo/samza,prateekm/samza,apache/samza,nickpan47/samza,TiVo/samza,bharathkk/samza,nickpan47/samza,apache/samza,fredji97/samza,prateekm/samza,fredji97/samza,apache/samza,bharathkk/samza,prateekm/samza,lhaiesp/samza,nickpan47/samza,lhaiesp/samza,TiVo/samza,abhishekshivanna/samza,abhishekshivanna/samza,fredji97/samza,abhishekshivanna/samza,prateekm/samza,apache/samza,bharathkk/samza,TiVo/samza,prateekm/samza,nickpan47/samza,TiVo/samza,bharathkk/samza,fredji97/samza,lhaiesp/samza,lhaiesp/samza