[jdk23] RFR: 8334418: Update IANA Language Subtag Registry to Version 2024-06-14

[Justin Lu]

Please review this PR, which is a backport of commit [861aefca](https://github.com/openjdk/jdk/commit/861aefcafacdc21459ef966307f52568e327fd49) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

This updates the IANA subtag registry to version 2024-06-14.

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Commit messages:
 - Backport 861aefcafacdc21459ef966307f52568e327fd49

Changes: https://git.openjdk.org/jdk/pull/20125/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20125&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8334418
  Stats: 7 lines in 2 files changed: 4 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/20125.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20125/head:pull/20125

PR: https://git.openjdk.org/jdk/pull/20125