Update duckdb index files

iwslt2017-en-nl/train/index.duckdb

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:ae1249f55ff232773a15c05022b8d8e15ad78d7a5add13d275f13c81b1ec54e0
-size 22818816
+oid sha256:c111faf150223384439442e07bf9f621dae454e03438e903f1edeb85f26d8748
+size 23080960