git: openjdk/jdk-sandbox: classfile-api-branch: fixed doc building and web reference

[Adam Sotona]

Changeset: 58f91385
Author:    Adam Sotona <asotona at openjdk.org>
Date:      2023-02-06 11:27:22 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/58f9138504be22acab57b1fefed4ff41cf4331e1

fixed doc building and web reference

! README.md
! make/Docs.gmk