Updating the latest version on README

Author: ashwanthkumar

README.md

@@ -10,7 +10,7 @@ For Maven,
 <dependency>
   <groupId>in.ashwanthkumar</groupId>
   <artifactId>slack-java-webhook</artifactId>
-  <version>0.0.1</version>
+  <version>0.0.2</version>
 </dependency>
 ```