Update duckdb index files

.gitattributes

@@ -593,3 +593,4 @@ default/uz.train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/sk.validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/yue.validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/uz.validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/zh_CN.validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/zh_CN.validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5dc758e53798470dc39b5da854c40e078791f2e7a9e97e348f48155cc2bdce0a
+size 7876608