git: openjdk/jdk-sandbox: classfile-api-javadoc-branch: fixed old redirect

[Adam Sotona]

Changeset: 1f232863
Author:    Adam Sotona <asotona at openjdk.org>
Date:      2023-02-06 11:20:54 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/1f23286379adad79f7625835bb7f8f77b344aab1

fixed old redirect

! doc/classfile-api/javadoc/java.base/jdk/classfile/package-summary.html