Update README.md

Updated version in dependency snippet to next release

Author: mtransier

README.md

@@ -27,7 +27,7 @@ Add this dependency to your application pom.xml
 ```
 <groupId>cloud.anypoint</groupId>
 <artifactId>json-logger</artifactId>
-<version>2.2.1</version>
+<version>2.2.2</version>
 <classifier>mule-plugin</classifier>
 ```