Update duckdb index files

.gitattributes

@@ -79,3 +79,4 @@ 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-it-ro/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-en-ko/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+iwslt2017-it-nl/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

iwslt2017-it-nl/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ea0596c546d4b09e1b75f136618bdb3b482aa4dab2b058be3fe06ad0e10e1a83
+size 1060864