Update duckdb index files

.gitattributes

@@ -137,3 +137,4 @@ default/softwarerecs.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lf
 default/unix.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/wordpress.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/webapps.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/superuser.com/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/superuser.com/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3b906295b501e31edcf80d714d89c7446c01ba5be3165a958a09a74c1f8be9b1
+size 325595136