Update duckdb index files

.gitattributes

@@ -67,3 +67,4 @@ naturalquestions.original-split/validation/index.duckdb filter=lfs diff=lfs merg
 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.random-split/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+newsqa.random-split/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

newsqa.random-split/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:66f4aecfe5d960a8a957cbf8e8624d681b2bf8609ee45a0c1ac52a23aa6966a3
+size 1847296