Bump maven-war-plugin from 2.4 to 3.2.3 (#1129)

Bumps [maven-war-plugin](https://github.com/apache/maven-war-plugin) from 2.4 to 3.2.3.
- [Release notes](https://github.com/apache/maven-war-plugin/releases)
- [Commits](https://github.com/apache/maven-war-plugin/compare/maven-war-plugin-2.4...maven-war-plugin-3.2.3)
Signed-off-by: Ndependabot-preview[bot] <support@dependabot.com>

naked-objects/pom.xml

@@ -156,7 +156,7 @@
 				</plugin>
 				<plugin>
 					<artifactId>maven-war-plugin</artifactId>
-					<version>2.4</version>
+					<version>3.2.3</version>
 				</plugin>
 
 				<plugin>