Update duckdb index files

.gitattributes

@@ -57,3 +57,4 @@ VLyb--DBpedia50/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 VLyb--DBpedia50/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/test/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 sha256:098fd6187b212babfdd14933c557e9a3a47e8b2d217ceba0b889ae5cd18ef801
+size 1060864