RFR: 8295945: Revert unintended change to copyright start year

Mon Jul 8 13:49:36 UTC 2024

On Mon, 8 Jul 2024 13:31:03 GMT, Ambarish Rapte <arapte at openjdk.org> wrote:

> A quick fix to correct the created copyright year. 
> The created year in the header was unintentionally modified previously from 2021 to 2017.

Marked as reviewed by kcr (Lead).

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PR Review: https://git.openjdk.org/jfx/pull/1496#pullrequestreview-2163379488