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
 rusano--ELI5_custom/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+rusano--ELI5_custom/val/index.duckdb filter=lfs diff=lfs merge=lfs -text

rusano--ELI5_custom/val/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:40d9a94973786594525c51c28cfd619be2d76d8addc887071f8204bd995239c9
+size 127152128