Update duckdb index files

.gitattributes

@@ -67,3 +67,4 @@ vulrepair-bigvul-in/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 vulrepair-bigvul-out/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 selfapr-corpus-defects4j-Time-in/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 selfapr-corpus-defects4j-in/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+selfapr-corpus-defects4j-Lang-in/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text

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

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1377c50b278764dc760ab0e4e77f2b129c4fbf58501117e75d4d3883a0b7c7e6
+size 3179819008