build: update maven-war-plugin to 3.2.3

Changelog:
https://mail-archives.apache.org/mod_mbox/maven-announce/201905.mbox/%3Cb9b4a3285d7f65756f6babf7da661dca%40mail.eclipso.de%3E

Fix #1181

Author: php-coder

pom.xml

@@ -645,7 +645,7 @@
 		<thymeleaf.version>3.0.9.RELEASE</thymeleaf.version>
 
 		<togglz.version>2.6.1.Final</togglz.version>
-		<war.plugin.version>3.2.2</war.plugin.version>
+		<war.plugin.version>3.2.3</war.plugin.version>
 		<wiremock.plugin.version>5.0.0</wiremock.plugin.version>
 		<wiremock.version>2.25.1</wiremock.version>
 	</properties>