Update index.md
Update index.md

Added 2 anchors links to intro text.

Added row for Tanium, Inc.'s Endpoint Security product in "Products and Services" table.
johnwunder/johnwunder.github.io,STIXProject/stixproject.github.io,jburns12/stixproject.github.io,jburns12/stixproject.github.io,johnwunder/johnwunder.github.io,jburns12/stixproject.github.io,johnwunder/johnwunder.github.io,STIXProject/stixproject.github.io,STIXProject/stixproject.github.io,jburns12/stixproject.github.io,johnwunder/johnwunder.github.io,STIXProject/stixproject.github.io