Update duckdb index files

.gitattributes

@@ -60,3 +60,4 @@ kn/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ln/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ml/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 or/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+st/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

st/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e77a9cd37e3a311a5c34bd07e54f57e6afdcf28be92e4fba8c10bd208ce61398
+size 159920128