Update README.md

Add link to new release.

Author: HansOlsson

README.md

@@ -12,7 +12,7 @@ This library is inspired by Grafcet/Sequential Function Charts (SFC), Statechart
 
 ## Current release
 
-Download [Modelica_StateGraph2 v2.0.4 (2019-03-20)](https://github.com/HansOlsson/Modelica_StateGraph2/releases/download/v2.0.4/Modelica_StateGraph2-release.zip)
+Download [Modelica_StateGraph2 v2.0.5 (2020-04-02)](https://github.com/HansOlsson/Modelica_StateGraph2/releases/download/v2.0.5/Modelica_StateGraph2-release.zip)
 
 #### Release notes
 *  Version v2.0.5