Update duckdb index files

.gitattributes

@@ -96,3 +96,4 @@ mbpp-pl/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 mbpp-pl-keep/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 mbpp-py/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 mbpp-py-keep/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+mbpp-r/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

mbpp-r/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:7d58664dce9239c23d819100f8678d0453a5597c94a3e965b1c73da35836d824
+size 1323008