Update duckdb index files

.gitattributes

@@ -60,3 +60,4 @@ msalnikov--lc_quad2/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 s-nlp--lc_quad2/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 s-nlp--lc_quad2/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/test/index.duckdb 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:ced61b0e4f77709c47ea718253098f48787fc15338cdd20347d1521605605bd5
+size 3682304