Unit test: tweak secure connection check.

The main wikipedia page can be slow to load and thus triggers the timeout.
Let's use the fast Google site so that we don't get flaky outcome.

Issue #10882: https://github.com/ariya/phantomjs/issues/10882

test/webpage-spec.js

@@ -1069,7 +1069,7 @@ describe("WebPage object", function() {
 
     it('should open url using secure connection', function() {
         var page = require('webpage').create();
-        var url = 'https://en.wikipedia.org';
+        var url = 'https://www.google.com/m';
 
         var handled = false;