Update README.md

The documentaion Link did Link to the main website but not to the documentation

Author: lukasb1b

README.md

@@ -56,7 +56,7 @@ dependencies {
 
 <h2 id="documentation">Documentation :notebook_with_decorative_cover:</h2>
 
-See the [**documentation**](https://weeklycoding.com/mpandroidchart/) for examples and general use of MPAndroidChart.
+See the [**documentation**](https://weeklycoding.com/mpandroidchart/mpandroidchart-documentation/) for examples and general use of MPAndroidChart.
 
 See the [**javadocs**](https://jitpack.io/com/github/PhilJay/MPAndroidChart/v3.1.0/javadoc/) for more advanced documentation.