git: openjdk/jdk-sandbox: json: minor doc fix to disambiguate unescaped key string from map's value

[duke]

Changeset: 03a0db85
Branch: json
Author:    Naoto Sato <naoto.sato at oracle.com>
Date:      2025-06-23 15:19:59 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/03a0db85e50db5ff9801aaaf9d423b573a65be87

minor doc fix to disambiguate unescaped key string from map's value

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