Update duckdb index files

.gitattributes

@@ -92,3 +92,4 @@ bioasq-queries/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cqadupstack-wordpress-qrels/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cqadupstack-android-queries/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cqadupstack-unix-corpus/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+cqadupstack-wordpress-corpus/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

cqadupstack-wordpress-corpus/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:18e56f7e65babcb6e6ee393176f49d37bd9641f2dbb91640ad7777d85aaa5030
+size 316682240