git: openjdk/leyden-docs: master: Add Premain EA link, Premain JEP links, link to training run doc (#4)

[duke]

Changeset: 2faaf6e8
Branch: master
Author:    John Rose <rose00 at mac.com>
Committer: GitHub <noreply at github.com>
Date:      2024-09-17 08:41:17 +0000
URL:       https://git.openjdk.org/leyden-docs/commit/2faaf6e80b43e953320a6461da691546f338f901

Add Premain EA link, Premain JEP links, link to training run doc (#4)

Co-authored-by: John Rose <jrose at openjdk.org>

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