RFR: 8330458: Add missing @since tag to ClassFile.JAVA_23_VERSION

[Joe Darcy]

8330458: Add missing @since tag to ClassFile.JAVA_23_VERSION

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Commit messages:
 - JDK-8330458: Add missing @since tag to ClassFile.JAVA_23_VERSION

Changes: https://git.openjdk.org/jdk/pull/18828/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18828&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8330458
  Stats: 5 lines in 1 file changed: 3 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/18828.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18828/head:pull/18828

PR: https://git.openjdk.org/jdk/pull/18828