The locale data based on the Unicode Consortium's CLDR has been upgraded to version 48. Besides the usual addition of new locale data and translation changes, there are notable changes from the upstream CLDR, affecting Date/Time/Number formattings:

[CLDR-16439](https://unicode-org.atlassian.net/browse/CLDR-16439) zone alias South_Pole was moved to McMurdo, so remove it from Auckland (#4592)
[CLDR-16665](https://unicode-org.atlassian.net/browse/CLDR-16665) key/type core values (#4577)
[CLDR-13688](https://unicode-org.atlassian.net/browse/CLDR-13688) Correct the first day of week for Iceland from Monday to Sunday (#4379)
[CLDR-18464](https://unicode-org.atlassian.net/browse/CLDR-18464) Add a Before Hijrah era to the Islamic calendars (#4581)
[CLDR-18572](https://unicode-org.atlassian.net/browse/CLDR-18572) Add more European Englishes (#4645)
[CLDR-18253](https://unicode-org.atlassian.net/browse/CLDR-18253) Add en_JP (#4634)
[CLDR-18603](https://unicode-org.atlassian.net/browse/CLDR-18603) Add GyM, GyMEd availableFormats to root, en (#4679)
[CLDR-18538](https://unicode-org.atlassian.net/browse/CLDR-18538) root,en: change H patterns without m[s] to add literal 'h' (#4708)
[CLDR-9814](https://unicode-org.atlassian.net/browse/CLDR-9814) Recover Turkey metazone names (#4741)
[CLDR-18788](https://unicode-org.atlassian.net/browse/CLDR-18788) Fix Russian metazones (#4833)
[CLDR-13542](https://unicode-org.atlassian.net/browse/CLDR-13542) Fix Swiss grouping separator (#5019)

Note that locale data is subject to change in a future release of the CLDR. Although not all locale data changes affect the JDK, users should not assume stability across releases. For more details, please refer to the [Unicode Consortium's CLDR release notes](https://cldr.unicode.org/index/downloads/cldr-48) and their [locale data deltas](https://unicode.org/cldr/charts/48/delta/index.html).