Fix broken link to the app spec

index.html

@@ -132,7 +132,7 @@ had it been designed for web apps">AngularJS</a>
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 					<h2>Getting Involved</h2>
 					<p>Is there a bug we haven't fixed or an MV* framework you feel would benefit from being included in TodoMVC?</p>
-					<p>If so, feel free to fork the repo and submit a pull request &mdash; we'll be happy to review it for inclusion.</p><p> Make sure you use the <a href="https://github.com/addyosmani/todomvc/tree/master/template">template</a> as a starting point and read the application <a href="https://github.com/addyosmani/todomvc/wiki/Todo-Application-Specification">specifications</a> to make sure your app meets the guidelines for our next major release.</p>
+					<p>If so, feel free to fork the repo, read our <a href="https://github.com/addyosmani/todomvc/wiki">contribution guidelines</a>, and submit a pull request &mdash; we'll be happy to review it for inclusion.</p><p> Make sure you use the <a href="https://github.com/addyosmani/todomvc/tree/master/template">template</a> as a starting point and read the <a href="https://github.com/addyosmani/todomvc/wiki/App-Specification">app specification</a>.</p>
 					<p><a class="btn" href="https://github.com/addyosmani/todomvc/pull/new/master">Submit Pull Request &raquo;</a></p>
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