fix issue with skipped test

[dhurley14]

Summary

Fixes issue introduced here: #253852 (comment)

[elasticmachine]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: 6b7074f

Failed CI Steps

• Jest Tests #4

Test Failures

• [job] [logs] Jest Tests #4 / Endpoint exceptions flyout When valid form state should disable submit button while closing alerts
• [job] [logs] Jest Tests #4 / Endpoint exceptions flyout When valid form state should enable "Add endpoint exception" button when form is valid

Metrics [docs]

✅ unchanged

cc @dhurley14