Update duckdb index files

.gitattributes

@@ -105,3 +105,4 @@ default/bestof/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/tifu/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/changemyview/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/explainlikeimfive/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/ifyoulikeblank/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/ifyoulikeblank/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e91797df258cf836d73de0a9d36c4db0bb4321adafbaa56159c78fbb782a2287
+size 255864832