Update duckdb index files

iwslt2017-en-zh/train/index.duckdb

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:08e5658466917cd8c5437706dc0c2d6c5a2e98f5e1ab9a355969755e5c336324
-size 25964544
+oid sha256:091be7d5cd1cf4026768888c58bb002a926e70ab63840e6eb8a54a437a345df4
+size 30420992