[openjdk-11, 21] regenerate copyright

Vladimir Petkorequested to merge
vpa1977/openjdk:copyright-update into openjdk-21

Regenerate copyright for the new upstream release. Bump copyright year in the fixed part of the generator.

Changes:

  * d/copyright-generator/copyright-gen.py: bump copyright year.
  * d/copyright: regenerate.

Testing:

  • built in sid chroot.

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