Update duckdb index files

.gitattributes

@@ -4,3 +4,4 @@ OGB--ogbg-molhiv/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/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 sha256:76dfa01c38b507bfdc240cf19663d1bb5e00638fc239931de7a0f124d2cc3093
+size 2109440