Update the web-platform-tests URL (#241)

CONTRIBUTING.md

@@ -27,8 +27,8 @@ contributors in the pull request's body or in subsequent comments.
 # 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 an issue](https://github.com/w3c/web-platform-tests/issues/new) to follow
+and if appropriate [file an 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

@@ -17,7 +17,7 @@ Level: 3
 Editor: Ali Alabbas, Microsoft Corp. https://microsoft.com, alia@microsoft.com
 Editor: Joshua Bell, Google Inc. https://google.com, jsbell@google.com
 Group: webplatform
-Test Suite: https://github.com/w3c/web-platform-tests/tree/master/IndexedDB
+Test Suite: https://github.com/web-platform-tests/wpt/tree/master/IndexedDB
 Complain About: accidental-2119 yes
 Markup Shorthands: css no, markdown yes
 </pre>