Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ torchgeo--eurosat/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 torchgeo--eurosat/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 torchgeo--eurosat/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:f23422e3b302b1a89211654c2bac51bc76a381a1e44cd69273cec117c8417f91
+size 1060864