Fix a broken loader url (#429)

Author: simplesmiler

src/guide/single-file-components.md

@@ -49,7 +49,7 @@ After you've taken a day to dive into these resources, we recommend checking out
 
 The template uses [Webpack](https://webpack.github.io/), a module bundler that takes a number of "modules" and then bundle them into your final application. To learn more about Webpack itself, [this video](https://www.youtube.com/watch?v=WQue1AN93YU) offers a good intro. Once you get past the basics, you might also want to check out [this advanced Webpack course on Egghead.io](https://egghead.io/courses/using-webpack-for-production-javascript-applications).
 
-In Webpack, each module can be transformed by a "loader" before included into the bundle, and Vue offers the [vue-loader](https://github.com/vuejs/vue-loader) plugin to take care of translating `.vue` single-file components. The [webpack-simple](https://github.com/vuejs-templates/webpack-simple) template has already set up everything for you, but if you'd like to learn more about how `.vue` components work with Webpack, you can read [the docs for vue-loader](vue-loader.vuejs.org).
+In Webpack, each module can be transformed by a "loader" before included into the bundle, and Vue offers the [vue-loader](https://github.com/vuejs/vue-loader) plugin to take care of translating `.vue` single-file components. The [webpack-simple](https://github.com/vuejs-templates/webpack-simple) template has already set up everything for you, but if you'd like to learn more about how `.vue` components work with Webpack, you can read [the docs for vue-loader](https://vue-loader.vuejs.org).
 
 ### For Advanced Users