[GNC-dev] Translators: Unmarked message found

[Frank H. Ellenberger]

Christian Wehling has found a not as translatable marked message. So I
have msgmerged it now despite string freeze.

If you had already completed the translation, review the file again.

If you are using /translationproject.org, I am not sure the change will
arrive there in time, use the file from
https://github.com/Gnucash/gnucash/tree/maint/po

Thanks
Frank