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
 awesome-japanese-nlp-classification-dataset/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+awesome-japanese-nlp-classification-dataset/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

awesome-japanese-nlp-classification-dataset/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3b0c7b3cd9c21f91ad45d1b3de9c10253292090a80c8509c5d64f3f2bcd111ac
+size 1060864