fix: wrap url check in retry.try (#29536)

since the url changes are async, keep testing the url until it passes or fails enough times

Author: w33ble

x-pack/test/functional/apps/canvas/smoke_test.js

@@ -46,8 +46,10 @@ export default function canvasSmokeTest({ getService, getPageObjects }) {
       await retry.waitFor('workpad page', () => testSubjects.exists('canvasWorkpadPage'));
 
       // check that workpad loaded in url
-      const url = await browser.getCurrentUrl();
-      expect(parse(url).hash).to.equal(`#/workpad/${testWorkpadId}/page/1`);
+      await retry.try(async () => {
+        const url = await browser.getCurrentUrl();
+        expect(parse(url).hash).to.equal(`#/workpad/${testWorkpadId}/page/1`);
+      });
     });
 
     it('renders elements on workpad', async () => {