Update duckdb index files

.gitattributes

@@ -140,3 +140,4 @@ cqadupstack-english-queries/test/index.duckdb filter=lfs diff=lfs merge=lfs -tex
 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-qrels/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:73d66c2d9d360715511f5f7362024a20d203a135a79cd09ec2bd45817a68fb4f
+size 1060864