Update 'pom.xml'

removed SNAPSHOT from artifact version

pom.xml

@@ -12,7 +12,7 @@
 	<groupId>org.gcube.portal</groupId>
 	<artifactId>social-mail-servlet</artifactId>
 	<packaging>war</packaging>
-	<version>2.4.0-SNAPSHOT</version>
+	<version>2.4.0</version>
 	<scm>
 		<connection>scm:git:https://code-repo.d4science.org/gCubeSystem/${project.artifactId}.git</connection>
 		<developerConnection>scm:git:https://code-repo.d4science.org/gCubeSystem/${project.artifactId}.git</developerConnection>