Update duckdb index files

.gitattributes

@@ -115,3 +115,4 @@ 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-ro-en/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

iwslt2017-ro-en/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4195b6ccce1fa92887ea91350e10e52ea3bb99d62fdf16a4808758497b9b6aa0
+size 24129536