Update duckdb index files

.gitattributes

@@ -57,3 +57,4 @@ zpn--tox21_srp53/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 zpn--tox21_srp53/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/test/index.duckdb 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/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:27037109756a4d1b87210ac9fe148387d54025a2ae53814e78c1ab964a63e5cd
+size 1060864