Update duckdb index files

.gitattributes

@@ -54,3 +54,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
 default/anime.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/ja.stackoverflow.com/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/ja.stackoverflow.com/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:030d41f05665c0b18db82e6ef8a65a747071108dc5a25afbfa1b508d9951e422
+size 197668864