Add git caveat

index.html

@@ -625,7 +625,7 @@ <h1>Collaborative code</h1>
                   <p class="status tried">Tried &amp; tested</p>
                 </header>
                 <div class="caption">
-                  <p><a href="http://www.github.com">Github</a> is useful, people can make ‘<a href="http://help.github.com/send-pull-requests/">pull requests</a>’ to help you improve your code. Find out more in our blog post - <a href="http://digital.cabinetoffice.gov.uk/2012/02/02/gov-uk-truly-open-platform/">GOV.UK - a truly open and collaborative platform</a></p>
+                  <p>Tools like <a href="http://www.github.com">Github</a> are useful because people can make ‘<a href="http://help.github.com/send-pull-requests/">pull requests</a>’ to help you improve your code. Find out more in our blog post - <a href="http://digital.cabinetoffice.gov.uk/2012/02/02/gov-uk-truly-open-platform/">GOV.UK - a truly open and collaborative platform</a></p>
                 </div>
               </article>
               <h3>Content</h3>