Update duckdb index files

.gitattributes

@@ -71,3 +71,4 @@ newsqa.random-split/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 paq.original-split/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 triviaqa.random-split/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 triviaqa.random-split/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+naturalquestions.random-split/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

naturalquestions.random-split/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1834b174ce6e93437800395ea5349718a63ca37716aa976ebae4d79530fbc9da
+size 114569216