forgot an s

[sirugh]

https://github.com/magento/pwa-studio/pull/2524/checks?check_run_id=846649788

[PWAStudioBot]

	Fails
🚫	Missing "Description" section. Please add it back, with detail.
🚫	Missing "Verification Steps" section. Please add it back, with detail.
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Generated by 🚫 dangerJS against 57f3fee

[devops-pwa-codebuild]

Performance Test Results

The following fails have been reported by WebpageTest. These numbers indicates a possible performance issue with the PR which requires further manual testing to validate.

https://pr-2528.pwa-venia.com : LH Performance Expected 0.85 Actual 0.51, LH Best Practices Expected 1 Actual 0.92, WPT Cache Expected 90 Actual 83.333333333333
https://pr-2528.pwa-venia.com/venia-tops.html : LH Performance Expected 0.75 Actual 0.36, LH Best Practices Expected 1 Actual 0.92
https://pr-2528.pwa-venia.com/valeria-two-layer-tank.html : LH Performance Expected 0.8 Actual 0.4, LH Accessibility Expected 0.9 Actual 0.89, LH Best Practices Expected 1 Actual 0.92, WPT Cache Expected 65 Actual 50