fixup

Author: ptheywood

CONTRIBUTING.md

@@ -78,6 +78,8 @@ This ensure that users on both Linux and Windows can continue to build FLAME GPU
 
 ## License
 
+FLAME GPU is available under two licenses:
+
 - [AGPL-3.0-only license](https://github.com/FLAMEGPU/FLAMEGPU2/blob/master/LICENSE.md) for open source usage
 - A commercial licenses for cases where the use of the open source AGPL-licensed version is not possible or desirable. Please see [flamegpu.com/download/licence/](https://flamegpu.com/download/licence/) for more information.