Update duckdb index files

.gitattributes

@@ -50,3 +50,4 @@ SetFit--xglue_nc/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 SetFit--xglue_nc/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 SetFit--xglue_nc/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2381cbfab2879a71f4c467e0c1506ff38a52d48e56b170dba4890eec9c6120d7
+size 269758464