[jdk24u] RFR: 8346690: Shenandoah: Fix log message for end of GC usage report

[duke]

On Fri, 20 Dec 2024 18:18:18 GMT, William Kemper <wkemper at openjdk.org> wrote:

> Clean backport. Changes to logging only.

@earthling-amzn 
Your change (at version cdbbe45a6a6530fcd03ae8cc5121903a05f9577a) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/jdk24u/pull/6#issuecomment-2560053577