Update duckdb index files

.gitattributes

@@ -90,3 +90,4 @@ ar_ko/sampled_validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cs_en/sampled_test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 en/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ar_ru/sampled_validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+cs_ja/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

cs_ja/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2f2922066c5a69aca320f1bd9b0f0b336c1f34480764d52b3f46cc48440d733b
+size 14954496