<i18n dev> RFR: 8302512: Update IANA Language Subtag Registry to Version 2023-02-14

[Justin Lu]

Incorporate the latest IANA language subtag registry definition (2023-02-14).

-------------

Commit messages:
 - Add missing JBS #s to test header
 - IANA update 2/14/23

Changes: https://git.openjdk.org/jdk/pull/12699/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12699&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8302512
  Stats: 9 lines in 2 files changed: 6 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/12699.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12699/head:pull/12699

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