Update duckdb index files

mathqa_general/test/index.duckdb

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:28be27d791a13124666e372bc6bd04fa6c39a13da65f3c3e67412ac1a4594dcc
-size 1323008
+oid sha256:a0b8ca4df7d03d629ccb06475eeecf07460fd89eaadd1d861a75db0adf817c90
+size 1060864