Update duckdb index files

.gitattributes

@@ -16,3 +16,4 @@ MARC-ja/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 JNLI/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 JSQuAD/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 JSTS/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
+JCoLA/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

JCoLA/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d4443a97729b7ca67fdacd6bb56c89e0e125b7454b2c566d6e26e908baf71f22
+size 1060864