fix typo reported by translator @cats
fix typo reported by translator @cats, thanks! ref: https://hosted.weblate.org/translate/f-droid/website-posts/en/?checksum=73c5d99bfb24a0a4
fix typo reported by translator @cats, thanks! ref: https://hosted.weblate.org/translate/f-droid/website-posts/en/?checksum=73c5d99bfb24a0a4