message: add noscript.css to essential-files
diff: @@ -385,7 +385,8 @@ impl DocBuilder {
  "settings.css",
  "storage.js",
  "theme.js",
  - "source-script.js"],
  + "source-script.js",
  + "noscript.css"],
  // files doesn't require rustc version subfix
  ["FiraSans-Medium.woff",
  "FiraSans-Regular.woff",
  