Update duckdb index files

.gitattributes

@@ -1,2 +1,3 @@
 mteb--banking77/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 mteb--banking77/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2a4100ae0d4b4eaa60101ef9fe8f553ad25ac9a5a9dabbdd0b8e489f1acb5bba
+size 1323008