Fix link to README.md which has changed.
diff --git a/involved.php b/involved.php
index b153838..fad588e 100644
--- a/involved.php
+++ b/involved.php
@@ -23,7 +23,7 @@
The WindowBuilder developers welcome your involvement. Simply follow steps in the Contribution guide:
</p>
<p>
-<a href="https://github.com/eclipse/windowbuilder#contributing">https://github.com/eclipse/windowbuilder</a>
+<a href="https://github.com/eclipse/windowbuilder#contributing-is-easy">https://github.com/eclipse/windowbuilder</a>
</p>
</div>
