fix: draftDuplicateEntry function duplicate i18n data

Author: starkovio

packages/decap-cms-core/src/actions/entries.ts

@@ -389,6 +389,7 @@ export function draftDuplicateEntry(entry: EntryMap) {
     type: DRAFT_CREATE_DUPLICATE_FROM_ENTRY,
     payload: createEntry(entry.get('collection'), '', '', {
       data: entry.get('data'),
+      i18n: entry.get('i18n'),
       mediaFiles: entry.get('mediaFiles').toJS(),
     }),
   };