RFR: 8371573: Shenandoah: Fix style of include directive [v2]

[Aleksey Shipilev]

On Mon, 10 Nov 2025 16:02:53 GMT, Kelvin Nilsen <kdnilsen at openjdk.org> wrote:

>> Fix style of include directive for improved consistency and compatibility with GraalVM conventions.
>
> Kelvin Nilsen has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove unneeded include

This looks fine, but I adjusted the bug title, so PR title also needs adjustments to match it.

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Marked as reviewed by shade (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/28219#pullrequestreview-3444057242