Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ train.json filter=lfs diff=lfs merge=lfs -text
 validation.json filter=lfs diff=lfs merge=lfs -text
 test.json filter=lfs diff=lfs merge=lfs -text
 suolyer--copywriting/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+suolyer--copywriting/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

suolyer--copywriting/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3133c57115588b318ecec4a2f84739ef94ddaa0e8cd779353453808969cf0d0f
+size 33828864