Update duckdb index files

.gitattributes

@@ -565,3 +565,4 @@ default/sat.train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/zh_CN.test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/tt.train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/sr.test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/myv.validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/myv.validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:617088ce25ef51728f97afec8d3686350d8d1dbced9b6c38965d90eefa8d29a2
+size 1323008