[tx-robot] updated from transifex

apps/files/l10n/el.js

apps/files/l10n/el.json

apps/files/l10n/zh_CN.js

apps/files/l10n/zh_CN.json

apps/files_external/l10n/zh_CN.js

apps/files_external/l10n/zh_CN.json

apps/updatenotification/l10n/es.js

apps/updatenotification/l10n/es.json

apps/user_ldap/l10n/el.js

apps/user_ldap/l10n/el.json

core/l10n/cs.js

core/l10n/cs.json

core/l10n/de.js

core/l10n/de.json

core/l10n/de_DE.js

core/l10n/de_DE.json

core/l10n/el.js

core/l10n/el.json

core/l10n/es.js

core/l10n/es.json