Update duckdb index files

.gitattributes

@@ -101,3 +101,4 @@ iwslt2017-nl-it/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-nl-ro/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-nl-en/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-nl-ro/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 sha256:9e58e4c9db289cd568bdb385ce48495aeb4e4a111128900cf8bff4458dbd4365
+size 24129536