Update duckdb index files

.gitattributes

@@ -99,3 +99,4 @@ iwslt2017-nl-ro/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-nl-ro/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 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/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:68bd7aa8f49a60d551bdac4f6b937b5a5739d784fc5ee166211ecca3ee73615a
+size 1060864