docs(config): update note on config languages to include TypeScript

The list of files showing how Karma finds configuration lists TypeScript, but the note preceding it did not. Small change, nothing crazy.

Author: somewhatabstract

docs/config/01-configuration-file.md

@@ -6,7 +6,7 @@ is by using the `karma init` command. This page lists all of the available confi
 Note: Most of the framework adapters, reporters, preprocessors and launchers needs to be loaded as [plugins].
 
 
-The Karma configuration file can be written in JavaScript or CoffeeScript and is loaded as a regular Node.js module.
+The Karma configuration file can be written in JavaScript, CoffeeScript, or TypeScript and is loaded as a regular Node.js module.
 
 Unless provided as argument, the Karma CLI will look for a configuration file at