git: openjdk/jfx: jfx22: 8325873: Update JDK_DOCS property to point to JDK 21 docs

[Kevin Rushforth]

Changeset: f15a4add
Author:    Kevin Rushforth <kcr at openjdk.org>
Date:      2024-02-15 12:51:05 +0000
URL:       https://git.openjdk.org/jfx/commit/f15a4add7133c94f4bae3c0abaeb16d1b31ee6cd

8325873: Update JDK_DOCS property to point to JDK 21 docs

Reviewed-by: arapte
Backport-of: f379eae65aab963779d7b7335cbade810f8efe82

! build.gradle
! gradle/verification-metadata.xml