git: openjdk/guide: Section on release notes

[Jesper Wilhelmsson]

Changeset: 263b2c04
Author:    Jesper Wilhelmsson <jwilhelm at openjdk.org>
Date:      2022-03-25 16:27:13 +0000
URL:       https://git.openjdk.java.net/guide/commit/263b2c045c2975419aa2c897ea4424275ee29783

Section on release notes

Co-authored-by: Roger Calnan <roger.calnan at oracle.com>
Reviewed-by: dholmes, iris

! src/guidestyle.css
! src/index.md