Update duckdb index files

.gitattributes

@@ -1446,3 +1446,4 @@ ar_es/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ar_fr/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ar_it/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ar_id/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+ar_nl/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

ar_nl/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:33728158f59ae20d1775b3f4916f057adeaecf664e4c8c3faccd3571b8e4a82f
+size 401354752