git: openjdk/jfx: master: 8299681: Change JavaFX release version to 21

[Kevin Rushforth]

Changeset: 23004367
Author:    Kevin Rushforth <kcr at openjdk.org>
Date:      2023-01-12 16:19:06 +0000
URL:       https://git.openjdk.org/jfx/commit/23004367dbe18ca9d6747b571744a3d4ab2c13c8

8299681: Change JavaFX release version to 21

Reviewed-by: arapte, angorya

! .jcheck/conf
! build.properties
! modules/javafx.base/src/test/java/test/com/sun/javafx/runtime/VersionInfoTest.java