Update duckdb index files

.gitattributes

@@ -55,3 +55,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
 C-MTEB--AFQMC/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 C-MTEB--AFQMC/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+C-MTEB--AFQMC/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

C-MTEB--AFQMC/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:87a082eb1eb8fbf5a3500692fbb42b3884397a1f793133f85c8474b1eff517ac
+size 2633728