Update duckdb index files

.gitattributes

@@ -146,3 +146,4 @@ cqadupstack-physics-corpus/train/index.duckdb filter=lfs diff=lfs merge=lfs -tex
 cqadupstack-programmers-queries/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cqadupstack-text-qrels/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cqadupstack-webmasters-corpus/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+cqadupstack-webmasters-qrels/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

cqadupstack-webmasters-qrels/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2f563507a77de5254e285917d1b419d3609fb47989f1b4171bf29928cc6e5b00
+size 1060864