Change demo title to module in index.md

Author: staleycyn

index.md

@@ -23,7 +23,7 @@ Scroll down for demonstrations.
 {% assign demos = site.pages | where_exp:"page", "page.url contains '/Instructions/Demos'" %}
 | Demonstration |
 | --- | 
-{% for activity in demos  %}| [{{ activity.demo.title }}]({{ site.github.url }}{{ activity.url }}) |
+{% for activity in demos  %}| [{{ activity.demo.module }}]({{ site.github.url }}{{ activity.url }}) |
 {% endfor %}