Update stratos installer README
Update stratos installer README

Signed-off-by: Manula Thantriwatte <699292129d6d2ea84702beac81892ecbbe18e068@apache.org>

Thanu/stratos,hsbhathiya/stratos,asankasanjaya/stratos,hsbhathiya/stratos,agentmilindu/stratos,lasinducharith/stratos,lasinducharith/stratos,pubudu538/stratos,agentmilindu/stratos,anuruddhal/stratos,gayangunarathne/stratos,asankasanjaya/stratos,pkdevbox/stratos,pkdevbox/stratos,asankasanjaya/stratos,lasinducharith/stratos,lasinducharith/stratos,asankasanjaya/stratos,agentmilindu/stratos,hsbhathiya/stratos,pubudu538/stratos,pkdevbox/stratos,anuruddhal/stratos,pkdevbox/stratos,anuruddhal/stratos,Thanu/stratos,dinithis/stratos,dinithis/stratos,lasinducharith/stratos,pkdevbox/stratos,agentmilindu/stratos,pubudu538/stratos,dinithis/stratos,dinithis/stratos,ravihansa3000/stratos,anuruddhal/stratos,hsbhathiya/stratos,apache/stratos,Thanu/stratos,Thanu/stratos,apache/stratos,dinithis/stratos,gayangunarathne/stratos,lasinducharith/stratos,anuruddhal/stratos,Thanu/stratos,hsbhathiya/stratos,ravihansa3000/stratos,asankasanjaya/stratos,dinithis/stratos,pkdevbox/stratos,Thanu/stratos,agentmilindu/stratos,pubudu538/stratos,hsbhathiya/stratos,ravihansa3000/stratos,gayangunarathne/stratos,pubudu538/stratos,asankasanjaya/stratos,dinithis/stratos,pubudu538/stratos,anuruddhal/stratos,ravihansa3000/stratos,apache/stratos,asankasanjaya/stratos,anuruddhal/stratos,agentmilindu/stratos,apache/stratos,lasinducharith/stratos,ravihansa3000/stratos,gayangunarathne/stratos,apache/stratos,agentmilindu/stratos,pubudu538/stratos,apache/stratos,ravihansa3000/stratos,hsbhathiya/stratos,gayangunarathne/stratos,ravihansa3000/stratos,gayangunarathne/stratos,gayangunarathne/stratos,Thanu/stratos,apache/stratos,pkdevbox/stratos