deps: Update flatten-plugin to v1.6.0

Author: lqiu96

java-shared-config/pom.xml

@@ -187,7 +187,7 @@
         <plugin>
           <groupId>org.codehaus.mojo</groupId>
           <artifactId>flatten-maven-plugin</artifactId>
-          <version>1.3.0</version>
+          <version>1.6.0</version>
           <executions>
             <!-- enable flattening -->
             <execution>