Update duckdb index files

.gitattributes

@@ -82,3 +82,4 @@ ta/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 tn/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ts/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ur/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+xh/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

xh/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6c75036980c2a429d581d08a6e71a755918c48748e257a286e485baef7af85a5
+size 366227456