[jfx20] RFR: 8304359: Create release notes for JavaFX 20 [v3]

[Kevin Rushforth]

On Thu, 16 Mar 2023 23:20:05 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> Release notes for JavaFX 20, including one important change to note (the requirement of JDK 17 as the minimum needed to run JavaFX 20) and the list of enhancements and bugs fixed in this release.
>> 
>> Note: This PR is targeted to `jfx20`.
>
> Kevin Rushforth has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Move JDK-8298728 to the Bugs list

> There are a few issues labelled as `noreg-doc`, but are still a part of the release notes. Can you confirm if these are required to be in this list?

Thanks for checking. Of the 10 `noreg-doc` bugs, 7 of them are correctly included in the release notes, since they affect the published API docs (the other three are explicitly excluded, since they don't affect any production docs). This matches what we did for previous releases.

Your question did cause me to look more closely at the JBS query, and I found a bug in the query that was causing intra-release bugs (bugs introduced in one build of jfx20 and fixed in a subsequent build) to be included, which wasn't the intention. So there are two bugs that should be excluded: [JDK-8301797](https://bugs.openjdk.org/browse/JDK-8301797) and [JDK-8301832](https://bugs.openjdk.org/browse/JDK-8301832). I have updated the [FX 20 RN Issues](https://bugs.openjdk.org/issues/?filter=42636) filter, so it should now match the latest state of this PR.

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PR: https://git.openjdk.org/jfx/pull/1060