Update duckdb index files

Hack90--libre_chem_textbooks/train/index.duckdb

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:68e15eb9195b28718f8abf635476fef74faa2958d5ccc848624419d7e6d8ae21
-size 31993856
+oid sha256:a7cf79009f9e4098890c4f4f1266e4507b72d77d79eaeb4e8999784b063591fd
+size 31731712