Update duckdb index files

.gitattributes

@@ -423,3 +423,4 @@ capn-proto/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 linker-script/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 julia/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 gnuplot/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 sha256:73dc92465275bcf6fdca7cdff4783da6f6635e5b25eb4ea1205468352e2bb7cc
+size 1060864