git: openjdk/jdk-sandbox: json: ISE -> IAE for illegal escape (except value())

[duke]

Changeset: 237a7320
Branch: json
Author:    Naoto Sato <naoto.sato at oracle.com>
Date:      2025-02-04 09:30:09 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/237a732062130167b8072b409fc998693105838e

ISE -> IAE for illegal escape (except value())

! src/java.base/share/classes/java/util/json/JsonString.java
! src/java.base/share/classes/java/util/json/JsonStringImpl.java
! test/jdk/java/util/json/TestJsonString.java