[jdk25] RFR: 8354872: Clarify java.lang.Process resource cleanup

[Iris Clark]

On Mon, 7 Jul 2025 18:29:34 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

> Identical doc-only backport to jdk 25. Already approved in the CSR.

Changes appear to be identical to those in `master` branch.

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Marked as reviewed by iris (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/26168#pullrequestreview-2994952826