[en] update footertext.md

[trebmuh]

closes #255

[ann0see]

Thanks. Nevertheless, merging it to release instead of changes would violate the "typo fix only" policy. Translators would not be aware of this change. But I must admit, I've partly violated it with the new installer.

[trebmuh]

I thought you were doing something like a hook which automatically updated changes with modifications made to release?

[trebmuh]

Any way, done: 38511a3

[ann0see]

Yes. But this doesn't include content which needs to be translated. So if you change something in french and merge it to release, it will also add the commit to changes. But obviously this isn't possible for multiple languages.

[trebmuh]

You're right. Thanks for the explanation and sorry for the mistake here.