drop explicit version

Signed-off-by: wind57 <[email protected]>

Author: wind57

spring-cloud-kubernetes-examples/kubernetes-leader-election-example/pom.xml

@@ -74,6 +74,7 @@
 				</configuration>
 			</plugin>
 			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-surefire-plugin</artifactId>
 				<version>3.5.3</version>
 			</plugin>