Use a proper example domain (#4074)

See RFC6761

core/src/test/java/hudson/FunctionsTest.java

@@ -280,7 +280,7 @@ public class FunctionsTest {
     @Test
     @PrepareForTest(Stapler.class)
     public void testGetActionUrl_unparseable() throws Exception{
-        assertEquals(null, Functions.getActionUrl(null, createMockAction("http://nowhere.net/stuff?something=^woohoo")));
+        assertEquals(null, Functions.getActionUrl(null, createMockAction("http://example.net/stuff?something=^woohoo")));
     }
 
     private static Action createMockAction(String uri) {