Update duckdb index files

iwslt2017-en-it/train/index.duckdb

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:dff3f01719de534e218772adf057903e0dbf9033f808e356f777ce7bdb1507a6
-size 25178112
+oid sha256:caf5388b6feca3b2392d8b8e52bdd42f0953c7b9a82a4a22607902b125e337a1
+size 24915968