Update suggestion link on course website

Author: benhylau

site/_layouts/page.html

@@ -80,6 +80,6 @@ <h3>In This Section</h3>
 <p class="help-us">
     <edit></edit>
     Help us improve content and
-    <a target="_blank" href="https://github.com/{{ site.github.repo }}/edit/{{ site.github.branch }}/{{ page.path }}">suggest changes</a> to this page.
+    <a target="_blank" href="https://github.com/{{ site.github.repo }}/issues">suggest changes</a> to this course.
 </p>
 </div>