RFR: 8366157: Clarify in man pages that only G1 supports MaxGCPauseMillis [v2]

[Thomas Schatzl]

On Thu, 28 Aug 2025 09:30:02 GMT, Jonas Norlinder <duke at openjdk.org> wrote:

>> Hi all,
>> 
>> This patch clarifies the description of `MaxGCPauseMillis`.
>
> Jonas Norlinder has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Improve description after review discussion

Marked as reviewed by tschatzl (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/26940#pullrequestreview-3164457520