Adds a URL link to the “BCP 47” reference in the Locale class description. Also normalizes the existing RFC 4647 and RFC 5646 links to use rfc-editor.org URLs
--------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - initial commit Changes: https://git.openjdk.org/jdk/pull/31621/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=31621&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8387041 Stats: 12 lines in 1 file changed: 3 ins; 0 del; 9 mod Patch: https://git.openjdk.org/jdk/pull/31621.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/31621/head:pull/31621 PR: https://git.openjdk.org/jdk/pull/31621
