Update duckdb index files

.gitattributes

@@ -101,3 +101,4 @@ iwslt2017-nl-ro/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-ro-en/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-ro-en/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-ro-en/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+iwslt2017-ro-it/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

iwslt2017-ro-it/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:20f7c52ceafc37ec1c3993299fecead9322bd81e79d17ccad271c707cd5e3010
+size 23605248