fix numbering of headlines

The number 5 was used twice while item 4 did not exist before:

3. Create Test
5. Write a Basic Test
5. Configure Acceptance Tests

Now:


3. Create Test
4. Write a Basic Test
5. Configure Acceptance Tests

Author: xabbuh

quickstart.html

@@ -71,7 +71,7 @@ <h4 class="panel-title">1.Install</h4>
 
           <div class="panel panel-info">
             <div class="panel-heading">
-              <h4 class="panel-title">5. Write a Basic Test</h4>
+              <h4 class="panel-title">4. Write a Basic Test</h4>
             </div>
             <div class="panel-body">
               <p>It's now time to write your first test. Edit the file we've just created