Update module-1 index.qmd: Added "Let's build an app" slide

modules/module-1/index.qmd

@@ -1,5 +1,5 @@
 ---
-title: "Module 1"
+title: "Module 1 - Where is the one switch"
 ---
 
 This is the first module of the CWC course, and is designed for those with very little to no experience with coding (programmatic, and not clinical terminologies).
@@ -10,4 +10,5 @@ This is the first module of the CWC course, and is designed for those with very
   <li><a href="slides/1-introduction.html" target="_blank">1 - Introduction</a></li>
   <li><a href="slides/2-coding-environment.html" target="_blank">2 - Coding environment</a></li>
   <li><a href="slides/3-python-basics.html" target="_blank">3 - Python basics</a></li>
+  <li><a href="slides/4-lets-build.html" target="_blank">4 - Let's build an app</a></li>
 </ul>