<i18n dev> RFR: 8308021: Update IANA Language Subtag Registry to Version 2023-05-11

Fri May 12 18:02:59 UTC 2023

Please review this trivial fix which updates the IANA data to version 5/11/2023. As the update only includes variant sub-tags, there is no impact to JDK tests. The update can be found [here](https://mm.icann.org/pipermail/ietf-languages-announcements/2023-May/000087.html).

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

Commit messages:
 - Update LSRTest.java
 - Update registry.txt

Changes: https://git.openjdk.org/jdk/pull/13962/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13962&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8308021
  Stats: 20 lines in 2 files changed: 17 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/13962.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13962/head:pull/13962

PR: https://git.openjdk.org/jdk/pull/13962