Update duckdb index files

.gitattributes

@@ -7,3 +7,4 @@ copa/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 copa/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 hellaswag/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 hellaswag/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+hellaswag/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

hellaswag/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b2e4e9d6cf58d25366f7a23ba43c251ce47c6497557377fc52492d4d836082f1
+size 1323008