Update README.md (#1034)

Bump release version on button

README.md

@@ -1,7 +1,7 @@
 # Community Base Addons
 [![](https://img.shields.io/travis/CBATeam/CBA_A3.svg?style=flat-square)](https://travis-ci.org/CBATeam/CBA_A3)
 [![](https://img.shields.io/badge/Changelog-Link-orange.svg?style=flat-square)](https://github.com/CBATeam/CBA_A3/issues?q=is%3Aclosed+milestone%3A3.9)
-[![](https://img.shields.io/badge/Release-3.8.0-blue.svg?style=flat-square)](https://github.com/CBATeam/CBA_A3/releases/tag/v3.9.0.181012)
+[![](https://img.shields.io/badge/Release-3.9.0-blue.svg?style=flat-square)](https://github.com/CBATeam/CBA_A3/releases/tag/v3.9.0.181012)
 [![](https://img.shields.io/badge/Github-Wiki-lightgrey.svg?style=flat-square)](https://github.com/CBATeam/CBA_A3/wiki)
 [![](https://img.shields.io/badge/BIF-Thread-lightgrey.svg?style=flat-square)](https://forums.bistudio.com/topic/168277-cba-community-base-addons-arma-3)
 [![](https://img.shields.io/badge/Function-Documentation-yellow.svg?style=flat-square)](https://cbateam.github.io/CBA_A3/docs/files/overview-txt.html)