git: openjdk/jdk-sandbox: classfile-api-initial-branch: Update README.md

[duke]

Changeset: dadfc01d
Author:    Adam Sotona <asotona at users.noreply.github.com>
Committer: GitHub <noreply at github.com>
Date:      2022-10-17 12:30:02 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/dadfc01d58e3ec79e32eaf01a3425b4b61fa0640

Update README.md

! README.md