Update duckdb index files

.gitattributes

@@ -75,3 +75,4 @@ default/sun397/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/imagenet21k/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/descriptors_birdsnap/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/food101/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/oxfordflowers/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/oxfordflowers/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:527cbe95c3f27313844f95c00edd12620310b12694bebd8b95fa75e1bc4526d4
+size 1060864