Update duckdb index files

.gitattributes

@@ -87,3 +87,4 @@ cqadupstack-stats-corpus/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cqadupstack-programmers-qrels/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 arguana-qrels/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cqadupstack-physics-qrels/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+cqadupstack-stats-queries/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

cqadupstack-stats-queries/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:cdc207cc58b5b49c20948d3ba007ed2b80d5f6a3f338929b7274561300f97de4
+size 3682304