tst_qquickanimations: bump defaultTryTimeout to 2 seconds

e7b90cfc31 changed the default to 1
second, which results in confusing failures where 1 second is not
enough... but it also was (QTBUG-139036). Many animations are 1 second
long, so bump the default timeout to 2 seconds.

Task-number: QTBUG-138662
Change-Id: I9b38e6cdbecda17cc2be65e93be4bdc7b8b0a529
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

tests/auto/quick/qquickanimations/tst_qquickanimations.cpp

@@ -40,6 +40,8 @@ private slots:
     {
         QQmlEngine engine;  // ensure types are registered
         QQmlDataTest::initTestCase();
+        // 1 second is not quite enough, since many animations are 1 second long.
+        QTest::defaultTryTimeout.store(std::chrono::seconds(2));
     }
 
     void simpleProperty();