[jdk16] RFR: 8259075: Update the copyright notice in the files generated by CLDR Converter tool

[Naoto Sato]

Please review this copyright notice update in the CLDR Converter tool. It is now synched with src/java.base/share/legal/cldr.md file.

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Commit messages:
 - 8259075: Update the copyright notice in the files generated by CLDR Converter tool

Changes: https://git.openjdk.java.net/jdk16/pull/85/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk16&pr=85&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8259075
  Stats: 13 lines in 1 file changed: 0 ins; 4 del; 9 mod
  Patch: https://git.openjdk.java.net/jdk16/pull/85.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk16 pull/85/head:pull/85

PR: https://git.openjdk.java.net/jdk16/pull/85