Update duckdb index files

.gitattributes

@@ -60,3 +60,4 @@ liuyanchen1015--MULTI_VALUE_mnli_em_subj_pronoun/train/index.duckdb filter=lfs d
 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:c3c66869ead1e0aa4732379eecc8068cfcf01976381d0632fbda968599a2d8cb
+size 1585152