Fixes a typo introduced in #101 where the rendered regex was not escaped correctly.
```
$ npm run test
ERROR in ../node_modules/monaco-editor/esm/vs/editor/editor.api.js (include-loader!../node_modules/monaco-editor/esm/vs/editor/editor.api.js) 9:15
Module parse failed: Invalid regular expression: /^((http:)|(https:)|(file:)|(/: Unterminated group (9:15)
File was processed with these loaders:
* ../out/loaders/include.js
You may need an additional loader to handle the result of these loaders.
| var pathPrefix = typeof __webpack_public_path__ === 'string' ? __webpack_public_path__ : "";
| var result = (pathPrefix ? stripTrailingSlash(pathPrefix) + '/' : '') + paths[label];
> if (/^((http:)|(https:)|(file:)|(//))/.test(result)) {
| var currentUrl = String(window.location);
| var currentOrigin = currentUrl.substr(0, currentUrl.length - window.location.hash.length - window.location.search.length - window.location.pathname.length);
@ ./index.js 2:0-77 4:0-13
```
Tested on local.
