git: openjdk/jdk-sandbox: json: Doc build fixes

[duke]

Changeset: 66136a89
Branch: json
Author:    Naoto Sato <naoto.sato at oracle.com>
Date:      2025-10-01 11:46:30 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/66136a89040adf4fa6b9d4f9d1da5a8ec18579d2

Doc build fixes

! make/conf/docs-modules.conf
! make/conf/module-loader-map.conf
! src/jdk.incubator.json/share/classes/module-info.java