updated install instruction in docs

docs/index.md

@@ -15,17 +15,17 @@ Visit the releases section on Github and download the [latest release](https://g
 
 ###### __Via NPM__
 ```bash
-npm install admin-lte@3.0.0-beta.2 --save
+npm install admin-lte@v3-latest --save
 ```
 
 ###### __Via Yarn__
 ```bash
-yarn add admin-lte@3.0.0-beta.2
+yarn add admin-lte@v3-latest
 ```
 
 ###### __Via Bower__
 ```bash
-bower install admin-lte#3.0.0-beta.2
+bower install admin-lte#v3-latest
 ```
 >  If bower asks which version of jQuery to use, choose version 3 or above.
 {: .quote-info}