Update duckdb index files

.gitattributes

@@ -55,3 +55,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 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/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0548313d48fc7f8a148021412d86f81da3ecffe3742c11b1c8a9fb7f4fa00854
+size 1060864