increase flatten-pom version

Author: sakthivelmanii

pom.xml

@@ -163,6 +163,11 @@
           <showDeprecation>true</showDeprecation>
         </configuration>
       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-resources-plugin</artifactId>
+        <version>3.3.1</version>
+      </plugin>
     </plugins>
   </build>