Update duckdb index files

.gitattributes

@@ -1179,3 +1179,4 @@ en-multi/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 en-multi/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ml/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ml/partial-validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+gu/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

gu/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6d29c0fb41663a9c54ef1d7053e8b4021ba352cf0537e48893b9041cd9efb308
+size 2208051200