git: openjdk/jdk-sandbox: json: Added JsonValue.equals() explanation for completeness

[duke]

Changeset: 4c60a362
Branch: json
Author:    Naoto Sato <naoto.sato at oracle.com>
Date:      2025-03-06 16:02:35 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/4c60a36248e9865052968e6c7629563b055422c4

Added JsonValue.equals() explanation for completeness

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