Update duckdb index files

.gitattributes

@@ -108,3 +108,4 @@ es_ja/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ar_de/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 fr_cs/sampled_validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 fr_cs/sampled_test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+cs_en/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

cs_en/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:cb535d80dd71f32008a60fc0f70272d235bb44ef4be02d3eb8d6f8e4774dc650
+size 14954496