Update duckdb index files

.gitattributes

@@ -15,3 +15,4 @@ funpedia/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 funpedia/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 gendered_words/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 image_chat/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+image_chat/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

image_chat/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:765d14d5eba68a5ec496938decd6fcfc5ad3c55e835dd8dfbbb12cd523de64f0
+size 38023168