Update duckdb index files

.gitattributes

@@ -93,3 +93,4 @@ javascript/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 julia/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 kotlin/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 lean/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+literate-coffeescript/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

literate-coffeescript/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f4d6b8a3cf662df27476fbe9186d8f313e768f5947a2271afc3c4536b9cfad56
+size 1323008