Update duckdb index files

iwslt2017-ko-en/train/index.duckdb

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:45cbb1a332c233a67bb919dd57760f412e0c8792cdccede756371464aca6ffb5
-size 28061696
+oid sha256:9e7fe71f75f52753e1a9bfb18740962926fe91e19db7d53c04dfe271aca517e7
+size 28323840