Update duckdb index files

.gitattributes

@@ -58,3 +58,4 @@ sem-eval-2014/valid/index.duckdb filter=lfs diff=lfs merge=lfs -text
 2016-restaurant-sem-eval/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 2016-restaurant-sem-eval/valid/0000.parquet filter=lfs diff=lfs merge=lfs -text
 2016-restaurant-sem-eval/test/0000.parquet filter=lfs diff=lfs merge=lfs -text
+2015-restaurant-aste-v2/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

2015-restaurant-aste-v2/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:00c9929f2f2020aa3ccb0ff0f234fbda78b226c0743a27717d00574202a5e847
+size 1060864