Update duckdb index files

.gitattributes

@@ -64,3 +64,4 @@ Pathology_Robbins/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Pharmacology_Katzung/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Neurology_Adams/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Anatomy_Gray_summary/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+Obstentrics_Williams/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

Obstentrics_Williams/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6932806b7df03883bbc9f2c7601f4e63f0abce8491b32306364db89d64cd84e2
+size 13643776