Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ dev.json filter=lfs diff=lfs merge=lfs -text
 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/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2c6dd2f619348f04729c45269b8dffba11f75b553b74896f8d01fec50799290b
+size 210513920