RFR: 8316135: Create release notes for JavaFX 21

[Kevin Rushforth]

On Tue, 12 Sep 2023 17:25:12 GMT, Andy Goryachev <angorya 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.
>
> doc-files/release-notes-21.md line 13:
> 
>> 11: ### JavaFX Requires macOS 11 or Later
>> 12: 
>> 13: On Mac platforms, JavaFX 21 requires macOS 11 or later. An exception will be thrown when initializing the JavaFX runtime on older versions of macOS.
> 
> just curious: all these lists (CSRs, Enhancements, Bug Fixes) are compiled from JBS, correct?

Yes, although there is no list of CSRs. The first section includes issues tagged with "release-note=yes". The list of enhancements and bugs are from the following JBS filter:

[FX 21 RN Issues](https://bugs.openjdk.org/issues/?filter=44607)

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PR Review Comment: https://git.openjdk.org/jfx/pull/1239#discussion_r1323358172