setting up api build lesson files

README.md

@@ -9,7 +9,7 @@
 1. [:15] Lesson/Code-along: [Nesting](nesting.md)
 1. [:10] Lesson: [Summary](routing_summary.md)
 1. [:15] Lesson/Demo: [What is an API?](what_is_an_api.md)
-1. [:15] Code-along: APIs
+1. [:15] Code-along: [Use an API](use_an_api.md)
 1. [:15] Lesson/Code-along: AJAX/Routing
 1. [:05] Lesson: Summary
 1. [:45] Code-along: Checkpoint!