RFR: 8318701: Fix copyright year

[Leo Korinth]

Fix copyright year to 2023

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Commit messages:
 - 8318701: Fix copyright year

Changes: https://git.openjdk.org/jdk/pull/16338/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16338&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8318701
  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/16338.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16338/head:pull/16338

PR: https://git.openjdk.org/jdk/pull/16338