Update 12-mkaburis-gitdemo.md

Updated caption

Author: mkaburis-esri

_slides/12-mkaburis-gitdemo.md

@@ -3,7 +3,7 @@ layout: slide
 title: "Welcome to our slide deck!"
 ---
 
-Caption here
+A huge fan of urban exploration, reading and public transit!
 
 ![cooler-octocat](https://octodex.github.com/images/twenty-percent-cooler-octocat.png)
 {: .center}