Fix spelling

[arjenz]

Pull Request Checklist

• I read the contributing guide
• UI change has been tested on both light and dark themes, in portrait and landscape orientations and on iPhone and iPad simulators
• Accessibility has been taken into account.

• Pull request is based on the develop branch

• Pull request contains a changelog file in ./changelog.d
• You've made a self review of your PR
• Pull request includes screenshots or videos of UI changes
• Pull request includes a sign off

[pixlwave]

Hi @arjenz, thanks very much for your contribution. We normally handle translation updates via https://translate.element.io/ as it avoids merge conflicts during our release process. Would you mind making the update over there?

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[arjenz]

Like many open source contributors, I am not signing a CLA for trivial 1 character pull requests fixing a typo.