Doc: link from Adding Connections to examples in another topic

Change-Id: I1bff533c217b75681e37a533e12df0fc2a9695c6
Reviewed-by: Tim Jenssen <tim.jenssen@theqtcompany.com>

doc/src/qtquick/qtquick-connection-editor.qdoc

@@ -47,6 +47,9 @@
 
     \endlist
 
+    For examples of adding connections, see
+    \l{Creating Scalable Buttons and Borders}.
+
     \section1 Connecting Objects to Signals
 
     To connect objects to signals in QML, create \l{Connections} objects.