[m-rev.] for review: add NEWS entry for Mercury 22.01.9

[Zoltan Somogyi]

On Sat, 23 May 2026 17:37:07 +1000, Julien Fischer <jfischer at opturion.com> wrote:
> For review by anyone.

I waited for a review by Peter, since I was not watching most of the issues
listed here, but ...

> +* [Mantis bug #566]. We have fixed issue that was causing GNU Make 4.4.0.90
> +  and above to emit warnings about undefined variables.

Are you sure about FOUR numbers in the version number? I don't think I have seen
more than three, major/minor/patch.

Other than that possible issue, the diff seems fine to me.

Zoltan.