git: openjdk/jfx: master: 8289835: Change JavaFX release version to 20

[Kevin Rushforth]

Changeset: b5e40496
Author:    Kevin Rushforth <kcr at openjdk.org>
Date:      2022-07-14 16:01:38 +0000
URL:       https://git.openjdk.org/jfx/commit/b5e40496883e5aa5faa10f11208df3b595b320c9

8289835: Change JavaFX release version to 20

Reviewed-by: arapte

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