Update duckdb index files

.gitattributes

@@ -54,3 +54,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 Rosenberg--webnlg/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Rosenberg--webnlg/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Rosenberg--webnlg/validation/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 sha256:0c50451243b77ca7eb0a1be9570d49097221e5b9b2a7be2a5e0590ac5dc2c2a0
+size 4993024