<i18n dev> RFR: 8313702: Update IANA Language Subtag Registry to Version 2023-08-02

[Justin Lu]

Please review this PR which updates the IANA data from version 05-11-2023 to version [08-02-2023](https://mm.icann.org/pipermail/ietf-languages-announcements/2023-August/000088.html).

The contents of the update added variant subtag “blasl” to the language subtag registry.

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Commit messages:
 - Support 08-02-23

Changes: https://git.openjdk.org/jdk/pull/15142/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15142&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8313702
  Stats: 12 lines in 2 files changed: 9 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/15142.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15142/head:pull/15142

PR: https://git.openjdk.org/jdk/pull/15142