Update duckdb index files

.gitattributes

@@ -74,3 +74,4 @@ Anatomy_Gray_128/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Biochemistry_Lippincott_128/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Cell_Biology_Alberts_128/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Gynecology_Novak_128/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+Histology_Ross_128/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

Histology_Ross_128/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:555b66330a16ed432bc26de1aa1c339221f8f2136fd4dfae7f1f786f65d655e7
+size 7614464