Update duckdb index files

.gitattributes

@@ -57,3 +57,4 @@ EddieChen372--devign_with_norm_vul_lines/train/index.duckdb filter=lfs diff=lfs
 EddieChen372--devign_with_norm_vul_lines/validation/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 sha256:12321218dd7e4f70c7ca06175ff83beec846f2034d8356d46a33fcb8d2b67fa1
+size 36450304