Support for Java 23

[robmoffat]

Bug Report

We get this problem trying to run the build on Java 23:

Caused by: java.lang.ExceptionInInitializerError: Exception java.lang.NoSuchMethodError: 'void sun.misc.Unsafe.ensureClassInitialized(java.lang.Class)' [in th

This is to do with GraalVM, used for Adaptive Cards.

We need to upgrade to use a newer version, as described here:

https://github.com/oracle/graaljs/blob/master/graal-js/test/maven-demo/pom.xml
oracle/graaljs#825