fix: upgrade netlify-plugin-stepzen version to 1.0.4

[vlukashov]

A roll-up of dependency updates.
More info at https://github.com/steprz/netlify-plugin-stepzen/releases/tag/v1.0.4

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• Included all required fields in your entry.
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Test plan
Please add a link to a successful public deploy log using the stated version of the plugin. Include any other context reviewers might need for testing.
https://app.netlify.com/sites/romantic-khorana-08bd2e/deploys/622731c696238a0008387741

[netlify-bot]

Updated Packages

• https://diff.intrinsic.com/netlify-plugin-stepzen/1.0.3/1.0.4

[ehmicky]

Thanks @vlukashov!