Update SUMMARY.md

AJ Robertson · AJ Robertson · commit fcce59cf90f2 · 2016-05-18T19:18:29.000-07:00
diff --git a/SUMMARY.md b/SUMMARY.md
@@ -2,5 +2,5 @@
 
 * [Introduction](README.md)
 * [System Preferences](chapter1.md)
-* Applications
+* [Applications](applications.md)
 
