Update duckdb index files

krana--pubmed_processed/train/index.duckdb

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:17fc93cc0d0e3fe419fec0771f4914e913d5aea5dc2315ebf626b0798a2058e3
-size 765472768
+oid sha256:71b6bd76df4c652534e5a6fcfb893c60acc268a9d3d3aafbb920b75ddddbe026
+size 766783488