[jdk11u-dev] RFR: 8306031: Update IANA Language Subtag Registry to Version 2023-04-13

[Andrew Lu]

I backport this for parity with 11.0.24-oracle.

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Commit messages:
 - Backport 261e45a973db0ad56b9ffe0901a63114a78a5e52

Changes: https://git.openjdk.org/jdk11u-dev/pull/2678/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2678&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8306031
  Stats: 33 lines in 3 files changed: 20 ins; 0 del; 13 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2678.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2678/head:pull/2678

PR: https://git.openjdk.org/jdk11u-dev/pull/2678