Update link in release notes

Change-Id: Iab51700f1f7826383bb3c1272b125c094bf8c391

WebContent/release-notes.html

                 because it results in fractional component sizes in many cases, which 
                 might cause unwanted 1px gaps between components.</p>
             </li>
-            <li>Up-to-date information about compatibility issues with push functionality is available in
-            <a href="https://vaadin.com/wiki/-/wiki/Main/Working+around+push+issues">this wiki page.</a>
+            <li>Up-to-date information about configuration needed for push and compatibility issues are available in
+            <a href="https://vaadin.com/wiki/-/wiki/Main/Configuring+push+for+your+environment">this wiki page.</a>
             <br />
             The most prominent limitations are:
             <ul>