Update duckdb index files

.gitattributes

@@ -70,3 +70,4 @@ selfapr-corpus-defects4j-in/partial-train/index.duckdb filter=lfs diff=lfs merge
 selfapr-corpus-defects4j-Lang-in/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 selfapr-corpus-defects4j-Mockito-in/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 selfapr-corpus-defects4j-Math-in/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+selfapr-corpus-defects4j-Closure-in/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text

selfapr-corpus-defects4j-Closure-in/partial-train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:aa8694778baf248b4ed1fac543f235a25d7ff5e1285fbf9bb8b8091c31ed1338
+size 4157353984