Update duckdb index files

.gitattributes

@@ -101,3 +101,4 @@ mbpp-rb/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 mbpp-r-keep/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 mbpp-rb-keep/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 mbpp-rkt/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+mbpp-rkt-keep/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

mbpp-rkt-keep/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:033c058721bac6ef3e06f6be3f65737bc6b5d47b210ebab0f6e1512930a20ffa
+size 1060864