Update pom.xml

Added missing configuration tag

Author: edler-san

pom.xml

@@ -671,7 +671,9 @@
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-resources-plugin</artifactId>
                     <version>3.3.1</version>
+                    <configuration>
                         <propertiesEncoding>UTF-8</propertiesEncoding>
+                    </configuration>
                 </plugin>
             </plugins>
         </pluginManagement>