Update duckdb index files

.gitattributes

@@ -61,3 +61,4 @@ ar_th/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ar_zh/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ar_th/sampled_validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ar_th/sampled_test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+ar_zh/sampled_validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

ar_zh/sampled_validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8cc9407a7472195616796f41e000bfdd0f94ac7455de3dc321421518ff4a564f
+size 27275264