Update duckdb index files

.gitattributes

@@ -76,3 +76,4 @@ iwslt2017-en-de/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-en-it/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-en-zh/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-en-nl/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+iwslt2017-en-ro/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

iwslt2017-en-ro/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e856f2b8139bded9c77070b2aaa2b37a964f8d201e6320a12bd47990ca245c7b
+size 24129536