[jfx20u] RFR: 8303987: Change JavaFX release version to 20.0.1 in jfx20u

[Kevin Rushforth]

On Fri, 10 Mar 2023 23:00:38 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

> Updates for the beginning of the 20.0.1 release.

@arapte or @johanvos can one of you review this?

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PR: https://git.openjdk.org/jfx20u/pull/1