fix(explore): Fix the test on AnnotationLayer

[justinpark]

SUMMARY

This commit fixes the test regression due to #22453

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

• Before

/home/runner/work/superset/superset/superset-frontend/src/explore/components/controls/AnnotationLayerControl/AnnotationLayer.test.tsx:159
  expect(await _testingLibrary.screen.findByText('Chart')).toBeInTheDocument();

• After

None

TESTING INSTRUCTIONS

CI

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[geido]

Thanks @justinpark a fix was already merged

[justinpark]

hotfix already merged