fix picker test

Author: LFDanLu

packages/@react-spectrum/s2/test/Picker.test.tsx

@@ -35,6 +35,7 @@ describe('Picker', () => {
     jest.useFakeTimers();
     jest.spyOn(window.HTMLElement.prototype, 'clientWidth', 'get').mockImplementation(() => 100);
     jest.spyOn(window.HTMLElement.prototype, 'clientHeight', 'get').mockImplementation(() => 100);
+    jest.spyOn(window.HTMLElement.prototype, 'scrollHeight', 'get').mockImplementation(() => 50);
   });
 
   afterEach(() => {