Fixed a markdown link typo

3.3-get-online.md

@@ -9,7 +9,7 @@ To turn it on:
     * click on 'Settings' in the right sidebar of your repo;
     * click the checkbox beside 'Issues'
     * head back to your repo by clicking on the big studyGroup at the top of the page.
-4. Edit your README file. Remember the text about your group that you wrote back in Section 1? In your directory of files, click on README.md and edit the generic text to include all the specific info about your group and what it's all about. If you'd like to do a bit of fancy formatting (headings, bold, italics, etc) you can use the built-in [GitHub Markdown toolbar] (https://help.github.com/articles/about-writing-and-formatting-on-github/).  
+4. Edit your README file. Remember the text about your group that you wrote back in Section 1? In your directory of files, click on README.md and edit the generic text to include all the specific info about your group and what it's all about. If you'd like to do a bit of fancy formatting (headings, bold, italics, etc) you can use the built-in [GitHub Markdown toolbar](https://help.github.com/articles/about-writing-and-formatting-on-github/).  
 5. Edit the _config.yml file in your new repository:
     * click on _config.yml;
     * click on the little pencil near the top right;