<i18n dev> RFR: 8258795: Update IANA Language Subtag Registry to Version 2021-05-11

[Joe Wang]

On Wed, 12 May 2021 16:28:54 GMT, Naoto Sato <naoto at openjdk.org> wrote:

> Please review the changes to the subject issue. This is to incorporate the latest language subtag registry definition into the JDK.

Marked as reviewed by joehw (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/3998