<i18n dev> RFR: 8372117: Correct the misleading comment in Character.UnicodeBlock

[Naoto Sato]

Trivial comment fix in `Character.UnicodeBlock`

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Commit messages:
 - initial commit

Changes: https://git.openjdk.org/jdk/pull/28401/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28401&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8372117
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/28401.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28401/head:pull/28401

PR: https://git.openjdk.org/jdk/pull/28401