RFR: 1563: The method 'CheckRun#updateMergeReadyComment' shouldn't update the comment if the comment has not changed [v4]

[Erik Joelsson]

On Tue, 4 Oct 2022 16:21:06 GMT, Zhao Song <duke at openjdk.org> wrote:

>> Do not update comment if the comment already exists.
>
> Zhao Song has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Adjusted some log

Marked as reviewed by erikj (Lead).

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PR: https://git.openjdk.org/skara/pull/1386