Fix Apache Ignite Link

You gotta pick one protocol or the other... 😅

README.md

@@ -42,7 +42,7 @@ We will enable zookeeper based node discovery soon. At which point we won't have
 
 ## Usage
 
-The cache server by default runs on port `6457`. Under the hood it uses [Apache Ignite](http://https://ignite.apache.org/) as the cache data grid.  In order to use this http cache in your project, add the following to your `buckconfig`:
+The cache server by default runs on port `6457`. Under the hood it uses [Apache Ignite](https://ignite.apache.org/) as the cache data grid.  In order to use this http cache in your project, add the following to your `buckconfig`:
 
 ```ini
 [cache]