Update duckdb index files

.gitattributes

@@ -87,3 +87,4 @@ iwslt2017-en-nl/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-en-ro/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-it-ro/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-en-zh/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+iwslt2017-it-en/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

iwslt2017-it-en/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5a69682ebbd21084fcc816daf54ef2b05f782a7e5f3f1b2ccaf28cc2a5360f77
+size 1060864