[doc] Update README for version upgrades.
diff --git a/README.md b/README.md
index cd4c0e1..61256fe 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,8 @@
 
 1. `www/index.html`
     - Update `<script type="text/javascript" src="cordova-x.x.x.js"></script>`
+2. `VERSION`
+    - Update the version
 3. Commit and Tag
     - `git commit -am "[app] Version x.x.x"`
     - `git tag x.x.x`