Update duckdb index files

.gitattributes

@@ -1238,3 +1238,4 @@ ha/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 hmn/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 id/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ig/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+ht/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

ht/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2bcaa2842dcc734e58dd4378fd09dfef4f98d4a4244b9a23ac37863eee7cbfdf
+size 1258565632