Update duckdb index files

.gitattributes

@@ -75,3 +75,4 @@ selfapr-corpus-defects4j-Chart-in/partial-train/index.duckdb filter=lfs diff=lfs
 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-out/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

selfapr-vul4j-out/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:03dd90922052e8e1ffbe3f46283094eef699257a0387c8c340a9a3421eb12bca
+size 4468736