Update duckdb index files

.gitattributes

@@ -114,3 +114,4 @@ iwslt2017-nl-ro/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-it-ro/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-nl-en/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-ko-en/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+iwslt2017-nl-it/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

iwslt2017-nl-it/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:130ffd50fde11f5f04b2dcc2d00917d65a62e3e5da348340301e1afe23813502
+size 23080960