Update duckdb index files

.gitattributes

@@ -33,3 +33,4 @@ vblagoje--lfqa/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 vblagoje--lfqa/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/validation/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 sha256:9275f9f705298cd1284a2147e2d42eadb4d1c125ffd97485eb6182b69d64f39c
+size 1403793408