Update README to version 0.4.0

Author: github-actions[bot]

README.md

@@ -28,7 +28,7 @@ Release artifact
 <dependency>
     <groupId>com.github.zrdj</groupId>
     <artifactId>java-filesearch</artifactId>
-    <version>0.2.0</version>
+    <version>0.4.0</version>
 </dependency>
 ```