git: openjdk/jdk-sandbox: json: fix offset increment bug for multi escapes from previous commit

[duke]

Changeset: 102bdeb6
Branch: json
Author:    Justin Lu <justin.lu at oracle.com>
Date:      2025-01-16 09:39:44 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/102bdeb63c8a0a18bbbaf1f603e81812976ba52d

fix offset increment bug for multi escapes from previous commit

! src/java.base/share/classes/java/util/json/JsonParser.java
! test/jdk/java/util/json/TestJsonObject.java