Fix the last link under npm dependencies (#1400)

docs/bulma-start.html

@@ -66,7 +66,7 @@ npm_url: https://www.npmjs.com/package/bulma-start
         <li><code><a href="https://github.com/jgthms/bulma" target="_blank">bulma</a></code></li>
         <li><code><a href="https://github.com/sass/node-sass" target="_blank">node-sass</a></code> to compile your own Sass file</li>
         <li><code><a href="https://github.com/postcss/postcss-cli" target="_blank">postcss-cli</a></code> and <code><a href="https://github.com/postcss/autoprefixer" target="_blank">autoprefixer</a></code> to add support for older browsers</li>
-        <li><code><a href="https://babeljs.io/docs/usage/cli/" target="_blank">babel-cli</a></code>, <code><a href="https://github.com/babel/babel-preset-env" target="_blank">babel-preset-env</a></code> and <code>[babel-preset-es2015-ie](https://github.com/jmcriffey/babel-preset-es2015-ie)</code> for compiling ES6 JavaScript files</li>
+        <li><code><a href="https://babeljs.io/docs/usage/cli/" target="_blank">babel-cli</a></code>, <code><a href="https://github.com/babel/babel-preset-env" target="_blank">babel-preset-env</a></code> and <code><a href="https://github.com/jmcriffey/babel-preset-es2015-ie">babel-preset-es2015-ie</a></code> for compiling ES6 JavaScript files</li>
       </ul>
 
       <p>Apart from <code>package.json</code>, the following files are included:</p>