Update duckdb index files

.gitattributes

@@ -53,3 +53,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.jpg filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
+izumi-lab--wikipedia-ja-20230720/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

izumi-lab--wikipedia-ja-20230720/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:7c8324649b6ddee8e30699c1f13a952cbd9882aaee44a93a78800b784c508604
+size 3162779648