Bug#1033069: release-notes: Update release notes entry for OpenJDK security support

[Moritz Muehlenhoff <jmm@inutil.org>]

Package: release-notes
Severity: important

Hi,
the "5.2.1.2. OpenJDK 17" section needs to be updated for bookworm:
The same applies for Java 21, so instead it should state:

Debian bookworm comes with an early access version of OpenJDK 21 (the next expected OpenJDK LTS
version after OpenJDK 17), to avoid the rather tedious bootstrap process. The plan is for
OpenJDK 21 to receive an update in bookworm to the final upstream release announced for
September 2023, followed by security updates on a best effort basis, but users should not
expect to see updates for every quarterly upstream security update.

Cheers,
        Moritz