Update duckdb index files

.gitattributes

@@ -111,3 +111,4 @@ iwslt2017-ro-it/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-ko-en/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-nl-it/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 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-it-ro/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a7bcd2489066a3f722ab84b2c17ac79bc9ef9c00e30ad227dcf7ea127dde1625
+size 1060864