Add youtube link for multiple device (part 2)

.gitignore

@@ -1,2 +1,3 @@
 node_modules
-whatsapp-session-*.json
+whatsapp-session-*.json
+whatsapp-sessions.json

readme.md

@@ -9,6 +9,7 @@ Watch the tutorials:
 - <a href="https://youtu.be/ksVBXF-6Jtc">Whatsapp API Tutorial: Sending Media File</a>
 - <a href="https://youtu.be/uSzjbuaHexk">Whatsapp API Tutorial: Deploy to Heroku</a>
 - <a href="https://youtu.be/5VfM9PvrYcE">Whatsapp API Tutorial: Multiple Device</a>
+- <a href="https://youtu.be/Cq8ru8iKAVk">Whatsapp API Tutorial: Multiple Device | Part 2</a>
 
 ### How to use?
 - Clone or download this repo