git: openjdk/jdk-sandbox: classfile-api-branch: Classfile API javadoc build fix

[Adam Sotona]

Changeset: 941dfb0e
Author:    Adam Sotona <asotona at openjdk.org>
Date:      2022-06-27 14:19:20 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/941dfb0ebac505caf6926cac97c279019817fb49

Classfile API javadoc build fix

! make/Docs.gmk