Update duckdb index files

.gitattributes

@@ -68,3 +68,4 @@ cs/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cs/sampled_validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ar_cs/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ar_pt/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+ar_en/sampled_validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

ar_en/sampled_validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:caf9cf638808f1db05314107d026de64910d88159847cca486362504ef51cc0b
+size 38023168