Update duckdb index files

.gitattributes

@@ -124,3 +124,4 @@ autohotkey/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 raml/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 awk/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 metal/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+literate-haskell/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

literate-haskell/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1c838f6ebb61c0a787d8e960b5030011c03370e6ec8fbbaeb67e9f4173d1de46
+size 1323008