build(deps): bump org.codehaus.mojo:exec-maven-plugin from 3.4.1 to 3…

….5.0 in /samples/concurrent-modification in the minor-and-patch group (#243)

samples/concurrent-modification/pom.xml

@@ -20,7 +20,7 @@
 			<plugin>
 				<groupId>org.codehaus.mojo</groupId>
 				<artifactId>exec-maven-plugin</artifactId>
-				<version>3.4.1</version>
+				<version>3.5.0</version>
 				<configuration>
 					<mainClass>io.dgraph.example.MultiThreadedMutationLauncher</mainClass>
 				</configuration>