Update duckdb index files

.gitattributes

@@ -57,3 +57,4 @@ test.json filter=lfs diff=lfs merge=lfs -text
 train.json filter=lfs diff=lfs merge=lfs -text
 semeru--Text-Code-concode-Java/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 semeru--Text-Code-concode-Java/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+semeru--Text-Code-concode-Java/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

semeru--Text-Code-concode-Java/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:969086f2fe53ee7c71f6ee9729cc458334de0cdd69d55fc893afb02c6e88a76f
+size 3158016