git: openjdk/jdk: master: 8349344: Clarify documentation of Arena.ofConfined

[Per Minborg]

Changeset: 2ff8440c
Branch: master
Author:    Per Minborg <pminborg at openjdk.org>
Date:      2025-02-05 13:48:34 +0000
URL:       https://git.openjdk.org/jdk/commit/2ff8440c76bb090634ecf4e6faa523498fd1d9f3

8349344: Clarify documentation of Arena.ofConfined

Reviewed-by: jvernee, jpai, mcimadamore

! src/java.base/share/classes/java/lang/foreign/Arena.java