Update deployment descriptor schema

Author: ivan_hargreaves

src/main/webapp/WEB-INF/web.xml

@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
+<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_1.xsd"
+	version="3.1">
     <display-name>cics-java-liberty-springboot-jcics</display-name>   
 <login-config>
         <auth-method>BASIC</auth-method>