Update duckdb index files

.gitattributes

@@ -141,3 +141,4 @@ cqadupstack-gaming-qrels/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cqadupstack-gis-corpus/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cqadupstack-mathematica-corpus/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cqadupstack-mathematica-qrels/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+cqadupstack-mathematica-queries/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

cqadupstack-mathematica-queries/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b2a02a08bb7c62432a8dce08e3311f31bee719ad4fcd2ac3de56e2eb4fd8a41f
+size 4468736