[jdk15u-dev] RFR: 8288650: Bump update version for OpenJDK: jdk-15.0.9

[Dmitry Cherepanov]

On Fri, 17 Jun 2022 07:46:49 GMT, Yuri Nesterenko <yan at openjdk.org> wrote:

> This is a regular update switching team repository to the October, 2022 release.
> Change is in the release number and the expected release date, and also in .jcheck/conf to instruct skara machinery do the switch.
> The change will be pushed just after the last 15.0.8 build made from the team repo is tagged.

Marked as reviewed by dcherepanov (Reviewer).

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PR: https://git.openjdk.org/jdk15u-dev/pull/224