Rename demo section

docs/website/blog/2022-05-02-odo-v3-alpha1.md

@@ -316,6 +316,8 @@ This will delete "my-nodejs-app" from the namespace "prj2".
 	- Service: svc
 ? Are you sure you want to delete "my-nodejs-app" and all its resources? Yes
 The component "my-nodejs-app" is successfully deleted from namespace "prj2"
+```
+
+## Demo
 
-## End-to-end use case
 <iframe width="740" height="500" src="https://www.youtube.com/embed/fw2_cVj3Mv4" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>