Update CHANGELOG.md

Fixed Version of in change log

Author: Tob0t

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 All notable changes to `microsoft-teams` will be documented in this file
 
-## 2.0.0 - 2020-04-27
+## 1.0.1 - 2020-04-27
 
 ### Breaking Change
 *Method button(string $text, string $url = '', array $params = []): has now only 3 params instead of 4 since the type param got obsolete. Please adapt your code if you were using more than the first required 2 params.*