update sample object extension

Toby Hodges · Toby Hodges · commit bb3b078e1ede · 2017-08-07T13:30:46.000+02:00
diff --git a/_episodes/16-file-formats.md b/_episodes/16-file-formats.md
@@ -40,7 +40,7 @@ parameterization.
 *sample.json*
 
 ```
-{% include cwl/sample.json %}
+{% include cwl/sample.yml %}
 ```
 
 Now invoke `cwl-runner` with the tool wrapper and the input object on the
