Update duckdb index files

.gitattributes

@@ -2,3 +2,4 @@ SkolkovoInstitute--paradetox/csv-train.parquet filter=lfs diff=lfs merge=lfs -te
 s-nlp--paradetox/csv-train.parquet filter=lfs diff=lfs merge=lfs -text
 s-nlp--paradetox/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
+default/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6f9d86c33b0fe130b9c1af0fd6a59221f4062962ecc58086ff3982faeba94359
+size 3420160