git: openjdk/jdk-sandbox: json: small doc fix

[duke]

Changeset: e965c445
Branch: json
Author:    Naoto Sato <naoto.sato at oracle.com>
Date:      2025-03-17 14:47:49 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/e965c4455d928de2d8064d8fde23fc6519134aef

small doc fix

! src/java.base/share/classes/java/util/json/JsonNumber.java
! src/java.base/share/classes/java/util/json/package-info.java