Update duckdb index files

.gitattributes

@@ -65,3 +65,4 @@ hotpotqa.random-split/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 naturalquestions.original-split/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 naturalquestions.original-split/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 newsqa.original-split/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+newsqa.original-split/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

newsqa.original-split/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:006c402e86b5649eaddfb65adb3ae5120b05c17c1f28040fada825b19b3c622e
+size 1585152