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

[Roger Riggs]

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

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Commit messages:
 - Backport afb4a1be9e5dc2a9c0d812f5a36717c9f82241a9

Changes: https://git.openjdk.org/jdk/pull/26168/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26168&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8354872
  Stats: 185 lines in 2 files changed: 99 ins; 7 del; 79 mod
  Patch: https://git.openjdk.org/jdk/pull/26168.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26168/head:pull/26168

PR: https://git.openjdk.org/jdk/pull/26168