Increase wait time on flaky test assertion

[nbudin]

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[github-actions]

Code Coverage Report: Only Changed Files listed

Package	Base Coverage	New Coverage	Difference
app/graphql/concerns/cms_parent_implementation.rb	🔴 40.54%	🔴 43.24%	🟢 2.7%
app/graphql/sources/cms_page_content.rb	🔴 0%	🟢 100%	🟢 100%
app/graphql/types/page_type.rb	🟢 88.89%	🟢 100%	🟢 11.11%
app/helpers/application_helper.rb	🟢 85.19%	🟢 86.21%	🟢 1.02%
app/javascript/BuiltInFormControls/AddFileModal.tsx	🔴 0%	🔴 33.33%	🟢 33.33%
app/javascript/BuiltInFormControls/LiquidInput.tsx	🟠 57.5%	🟠 60%	🟢 2.5%
app/policies/application_policy.rb	🟢 90.91%	🟢 93.94%	🟢 3.03%
app/services/cms_content_finder.rb	🟢 80.77%	🟢 84.62%	🟢 3.85%
test/system/page_weight_test.rb	🔴 0%	🟢 96.3%	🟢 96.3%
Overall Coverage	🟢 52.78%	🟢 52.84%	🟢 0.06%

Minimum allowed coverage is 0%, this run produced 52.84%