Update duckdb index files

.gitattributes

@@ -94,3 +94,4 @@ default/cola_perturbed_contraction/index.duckdb filter=lfs diff=lfs merge=lfs -t
 default/cola_perturbed_insertadv/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/cola_perturbed_punctuation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/cola_perturbed_prejudice/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/cola_perturbed_reverseneg/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/cola_perturbed_reverseneg/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c367964b2267f4a908e73820d49e6a3eaa259bb5dd0625ccfd0779387dd1ace9
+size 1323008