Update web-platform-tests URLs

Author: foolip

CONTRIBUTING.md

@@ -25,8 +25,8 @@ feature, you can remove yourself with the above syntax.
 # Tests
 
 For normative changes, a corresponding
-[web-platform-tests](https://github.com/w3c/web-platform-tests) PR is highly appreciated. Typically,
+[web-platform-tests](https://github.com/web-platform-tests/wpt) PR is highly appreciated. Typically,
 both PRs will be merged at the same time. Note that a test change that contradicts the spec should
 not be merged before the corresponding spec change. If testing is not practical, please explain why
-and if appropriate [file a web-platform-tests issue](https://github.com/w3c/web-platform-tests/issues/new)
+and if appropriate [file a web-platform-tests issue](https://github.com/web-platform-tests/wpt/issues/new)
 to follow up later. Add the `type:untestable` or `type:missing-coverage` label as appropriate.

index.bs

@@ -20,7 +20,7 @@ Repository: w3c/ambient-light
 Markup Shorthands: markdown on
 Inline Github Issues: off
 !Issue Tracking: <a href="https://github.com/w3c/ambient-light/milestones/Level%202">Level 2 Issues</a>
-!Test Suite: <a href="https://github.com/w3c/web-platform-tests/tree/master/ambient-light">web-platform-tests on GitHub</a>
+!Test Suite: <a href="https://github.com/web-platform-tests/wpt/tree/master/ambient-light">web-platform-tests on GitHub</a>
 Boilerplate: omit issues-index, omit conformance
 Default Biblio Status: current
 </pre>

index.html

@@ -1456,7 +1456,7 @@ <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="cont
      <dt>Bug Reports:
      <dd><a href="https://www.github.com/w3c/ambient-light/issues/new">via the w3c/ambient-light repository on GitHub</a>
      <dt>Test Suite:
-     <dd><a href="https://github.com/w3c/web-platform-tests/tree/master/ambient-light">web-platform-tests on GitHub</a>
+     <dd><a href="https://github.com/web-platform-tests/wpt/tree/master/ambient-light">web-platform-tests on GitHub</a>
     </dl>
    </div>
    <div data-fill-with="warning"></div>