Update javadoc tool version?

[Nir Lisker]

Hi,

I noticed that the JDK's javadoc contains a 'NEW' section [1], but
JavaFX's docs don't have it. Do we need to update the javadoc tool?

[1] https://docs.oracle.com/en/java/javase/19/docs/api/new-list.html

- Nir