Update 09-cschielein-test.md

Author: cschielein-test

_slides/09-cschielein-test.md

@@ -5,5 +5,5 @@ title: "Welcome to our slide deck!"
 
 I'm tired and have a bad cough!  
 
-![octofez](https://octodex.github.com/images/octofez.png)
+![octofez](https://octodex.github.com/images/mummytocat.gif)
 {: .center}