Revert "Changed references to images to be relative, so that they don't go cross repo."

This reverts commit d2faf094adde6535698196d3b5516d64620abac2.
Fixed relative link to be concrete.

This is generally not ideal, but since upstream and I have slightly different folder structures on github (really github?) this must be done for the time being. I think all the links will need to go relative after upstream branches once.