Update duckdb index files

.gitattributes

@@ -60,3 +60,4 @@ liuyanchen1015--MULTI_VALUE_mnli_drop_aux_yn/train/index.duckdb filter=lfs diff=
 default/dev_matched/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/dev_mismatched/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/test_matched/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/test_mismatched/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/test_mismatched/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4c958cc1906ad13d1ad05e35442a5cb40b6f3d88930e24abd6058ccef0e7c846
+size 1060864