[tx-robot] updated from transifex

apps/accessibility/l10n/el.js

apps/accessibility/l10n/el.json

apps/admin_audit/l10n/el.js

apps/admin_audit/l10n/el.json

apps/dashboard/l10n/cs.js

apps/dashboard/l10n/cs.json

apps/files/l10n/sk.js

apps/files/l10n/sk.json

apps/files_sharing/l10n/de.js

apps/files_sharing/l10n/de.json

apps/files_sharing/l10n/de_DE.js

apps/files_sharing/l10n/de_DE.json

apps/settings/l10n/cs.js

apps/settings/l10n/cs.json

core/l10n/cs.js

core/l10n/cs.json

core/l10n/sk.js

core/l10n/sk.json

lib/l10n/cs.js

lib/l10n/cs.json