Update readme.md

readme.md

@@ -4,7 +4,7 @@ Getting started? Play directly with the Babylon.js API using our [playground](ht
 
 [![npm version](https://badge.fury.io/js/babylonjs.svg)](https://badge.fury.io/js/babylonjs)
 [![Build Status](https://travis-ci.com/BabylonJS/Babylon.js.svg?branch=master)](https://travis-ci.com/BabylonJS/Babylon.js)
-[![Average time to resolve an issue](https://isitmaintained.com/badge/resolution/babylonJS/babylon.js.svg)](https://isitmaintained.com/project/babylonJS/babylon.js "Average time to resolve an issue")
+[![Average time to resolve an issue](http://isitmaintained.com/badge/resolution/BabylonJS/Babylon.js.svg)](http://isitmaintained.com/project/BabylonJS/Babylon.js "Average time to resolve an issue")
 [![Percentage of issues still open](https://isitmaintained.com/badge/open/babylonJS/babylon.js.svg)](https://isitmaintained.com/project/babylonJS/babylon.js "Percentage of issues still open")
 [![Build Size](https://img.badgesize.io/BabylonJS/Babylon.js/master/dist/preview%20release/babylon.js.svg?compression=gzip)](https://img.badgesize.io/BabylonJS/Babylon.js/master/dist/preview%20release/babylon.js.svg?compression=gzip)