fix typo: closure -> clojure

Author: maciejpirog

src/language.mapper.js

@@ -42,7 +42,7 @@ const languageMappings = {
  bash: { ext: "bash", monaco: "shell" },
  apex: { ext: "cls", monaco: "apex" },
  cls: { ext: "cls", monaco: "apex" },
- closure: { ext: "clj", monaco: "clojure" },
+ clojure: { ext: "clj", monaco: "clojure" },
  clj: { ext: "clj", monaco: "clojure" },
  libsonnet: { ext: "jsonnet", monaco: "jsonnet" },
  jsonnet: { ext: "jsonnet", monaco: "jsonnet" },