Update duckdb index files

.gitattributes

@@ -74,3 +74,4 @@ selfapr-corpus-defects4j-Closure-in/partial-train/index.duckdb filter=lfs diff=l
 selfapr-corpus-defects4j-Chart-in/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 vulrepair-corpus-in/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 vulrepair-corpus-out/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+selfapr-vul4j-in/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

selfapr-vul4j-in/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:bb208f46fdac7d2942f6acbd4102c5a9024c5e2e15885215ae0adaff2c19d919
+size 1323008