Update to GraalVM JDK 21.0.2

Author: findepi

settings.sh

@@ -11,7 +11,7 @@ elif [ "${JDK_VERSION}" = "java20" ]; then
     GRAAL_JDK_VERSION="20.0.2"
     BUILD_POLYGLOT=true
 elif [ "${JDK_VERSION}" = "java21" ]; then
-    GRAAL_JDK_VERSION="21.0.1"
+    GRAAL_JDK_VERSION="21.0.2"
     BUILD_POLYGLOT=false
 else
     echo "Unknown JDK_VERSION ${JDK_VERSION}" >&2