RFR: 8302512: Update IANA Language Subtag Registry to Version 2023-02-14 [v2]

[Naoto Sato]

On Tue, 21 Feb 2023 20:08:41 GMT, Justin Lu <jlu at openjdk.org> wrote:

>> Incorporate the latest IANA language subtag registry definition (2023-02-14).
>
> Justin Lu has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Copyright + correct date format

Marked as reviewed by naoto (Reviewer).

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PR: https://git.openjdk.org/jdk/pull/12699