RFR: 8316135: Create release notes for JavaFX 21 [v2]

Wed Sep 13 00:37:46 UTC 2023

On Tue, 12 Sep 2023 22:42:10 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> Release notes for JavaFX 21, including four important changes, and the list of enhancements and bugs fixed in this release.
>> 
>> I plan to integrate this on Monday, Sep 18th, and backport it to `jfx21` in time for Tuesday's release of JavaFX 21.
>
> Kevin Rushforth has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add missing bugs JDK-8305885 and JDK-8304290

LGTM

-------------

Marked as reviewed by mstrauss (Committer).

PR Review: https://git.openjdk.org/jfx/pull/1239#pullrequestreview-1623450906