git: openjdk/jdk-sandbox: json: Made JPE on duplicate key behavior normative

[duke]

Changeset: ef193974
Branch: json
Author:    Naoto Sato <naoto.sato at oracle.com>
Date:      2025-01-14 14:53:01 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/ef1939741b3e5c830f49ba996de1609000de9eb8

Made JPE on duplicate key behavior normative

! src/java.base/share/classes/java/util/json/Json.java
! src/java.base/share/classes/java/util/json/JsonObject.java