Update the ui settings in dashboard reporting tests

[bhavyarm]

Kibana version: 8.0.0

Elasticsearch version: 8.0.0

Browser version: chrome version

Describe the bug: Dashboard reporting tests are failing in CI for PNG layout. Creating this issue so I can update the base images.

dashboard
     │       Reporting
     │         Dashboard Reporting Screenshots
     │           PNG Layout
     │             downloads a PNG file: small dashboard:
     │
     │      Error: expected 0.09129735815213762 to be below 0.09
     │       at Assertion.assert (/dev/shm/workspace/parallel/20/kibana/node_modules/@kbn/expect/expect.js:100:11)
     │       at Assertion.lessThan.Assertion.below (/dev/shm/workspace/parallel/20/kibana/node_modules/@kbn/expect/expect.js:336:8)
     │       at Function.lessThan (/dev/shm/workspace/parallel/20/kibana/node_modules/@kbn/expect/expect.js:531:15)
     │       at Context.<anonymous> (test/functional/apps/dashboard/reporting/screenshots.ts:162:35)
     │       at Object.apply (/dev/shm/workspace/parallel/20/kibana/node_modules/@kbn/test/src/functional_test_runner/lib/mocha/wrap_function.js:73:16)

[elasticmachine]

Pinging @elastic/kibana-qa (Team:QA)

[tsullivan]

Error: expected 0.09129735815213762 to be below 0.09

Looks like this was happening because there was a toast error on the screen