Update duckdb index files

.gitattributes

@@ -133,3 +133,4 @@ fr_vi/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 fr_id/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 fr_vi/sampled_test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 fr_vi/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+ar_zh/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

ar_zh/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4320a255aa5f87d1fb6d77a282f3b0e8814692102b6bfffd30697b43cbf5a9da
+size 182202368