RFR: Merge jfx20

[Kevin Rushforth]

Final merge of `jfx20` into `master`.

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

Commit messages:
 - Merge jfx20
 - 8304359: Create release notes for JavaFX 20

The merge commit only contains trivial merges, so no merge-specific webrevs have been generated.

Changes: https://git.openjdk.org/jfx/pull/1062/files
  Stats: 135 lines in 1 file changed: 135 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/1062.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1062/head:pull/1062

PR: https://git.openjdk.org/jfx/pull/1062