[Dashboard] Update embed mode test screenshot (#174193)

Closes #163207

## Summary

This PR updates the embed mode baseline screenshot so that the failing
test can be unskipped. This test is, unfortunately, very fragile because
the font rendering is prone to changing between Chrome updates -
however, there isn't really a better way of checking for rendering
issues, so we'll have to continue just updating the baseline whenever a
failure happens 🙈


### Checklist

- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
- [x] [Flaky Test
Runner](https://ci-stats.kibana.dev/trigger_flaky_test_runner/1) was
used on any tests changed:
- Flaky test runner:
https://buildkite.com/elastic/kibana-flaky-test-suite-runner/builds/4749

![image](https://github.com/elastic/kibana/assets/8698078/eeb87dca-4542-4333-af8b-58d07a8c911e)


### For maintainers

- [ ] This was checked for breaking API changes and was [labeled
appropriately](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)

test/functional/apps/dashboard/group5/embed_mode.ts

@@ -56,8 +56,7 @@ export default function ({
       await browser.setWindowSize(1300, 900);
     });
 
-    // FLAKY: https://github.com/elastic/kibana/issues/163207
-    describe.skip('default URL params', () => {
+    describe('default URL params', () => {
       it('hides the chrome', async () => {
         const globalNavShown = await globalNav.exists();
         expect(globalNavShown).to.be(true);