RFR: 2310: Add missing commas in copyright years [v3]

[Pavel Rappo]

> Please review this utmost trivial change.

Pavel Rappo has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - Merge branch 'master' into 2310
 - Add an empty commit start GHA
 - Initial commit

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Changes:
  - all: https://git.openjdk.org/skara/pull/1664/files
  - new: https://git.openjdk.org/skara/pull/1664/files/a4fa656e..2568dff4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=skara&pr=1664&range=02
 - incr: https://webrevs.openjdk.org/?repo=skara&pr=1664&range=01-02

  Stats: 124 lines in 9 files changed: 35 ins; 27 del; 62 mod
  Patch: https://git.openjdk.org/skara/pull/1664.diff
  Fetch: git fetch https://git.openjdk.org/skara.git pull/1664/head:pull/1664

PR: https://git.openjdk.org/skara/pull/1664