Fix(l10n): Update translations from Transifex

apps/files/l10n/af.js

apps/files/l10n/af.json

apps/files/l10n/ar.js

apps/files/l10n/ar.json

apps/files/l10n/bg.js

apps/files/l10n/bg.json

apps/files/l10n/br.js

apps/files/l10n/br.json

apps/files/l10n/ca.js

apps/files/l10n/ca.json

apps/files/l10n/cs.js

apps/files/l10n/cs.json

apps/files/l10n/da.js

apps/files/l10n/da.json

apps/files/l10n/de.js

apps/files/l10n/de.json

apps/files/l10n/de_DE.js

apps/files/l10n/de_DE.json

apps/files/l10n/el.js

apps/files/l10n/el.json