fix: update alert text assertion to use correct newline character (#883)

test/integration/IOS/AlertTests.cs

@@ -51,7 +51,7 @@ public void TextAlertTest()
             _driver.FindElement(MobileBy.IosNSPredicate("label == 'show alert'")).Click();
             Thread.Sleep(500);
             string alertText = _driver.SwitchTo().Alert().Text;
-            Assert.That(alertText, Is.EqualTo("Cool title\r\nthis alert is so cool."));
+            Assert.That(alertText, Is.EqualTo("Cool title\nthis alert is so cool."));
         }
     }
 }