Integrated: 8349344: Clarify documentation of Arena.ofConfined

[Per Minborg]

On Tue, 4 Feb 2025 09:46:48 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> This PR proposes to clarify the documentation for `Arena.ofConfined()`. It is proposed to say that segments allocated from the returned `Arena` can _only_ be accessed by the thread that created the `Arena` in the first place.

This pull request has now been integrated.

Changeset: 2ff8440c
Author:    Per Minborg <pminborg at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/2ff8440c76bb090634ecf4e6faa523498fd1d9f3
Stats:     4 lines in 1 file changed: 0 ins; 0 del; 4 mod

8349344: Clarify documentation of Arena.ofConfined

Reviewed-by: jvernee, jpai, mcimadamore

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PR: https://git.openjdk.org/jdk/pull/23435