Run Lighthouse CI on Shopify theme

Version updated for Shopify/lighthouse-ci-action to version v1.1.3.

• This publisher is shown as ‘verified’ by GitHub.
• This action is used across all versions by 1,229 repositories.

Go to the GitHub Marketplace to find the latest changes.

Release notes

Fixes

• Upgrade ruby to minimum CLI version #74

• Shopify
• GitHub Actions