Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ train.csv filter=lfs diff=lfs merge=lfs -text
 VLyb--FB15k/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 VLyb--FB15k/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 VLyb--FB15k/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:bd773097e6c991cf201c767b5232ccec37fc61cfae7f3677b3bdcb612fcea89f
+size 4993024