Update duckdb index files

iwslt2017-en-ja/train/index.duckdb

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:95614b6f23a32e39275b5de955e6bf5af57740065de6360363c9a4830b90fd08
-size 26750976
+oid sha256:40aabe4e108f0360cef099041fb478eac0fc36bb8bd894595eaaf0438c2efe46
+size 33042432