chore: update zod to 3.21.4

[heggemsnes]

zod@3.20.2 introduced some issues with type recursions that I think may have caused some wierd Type instantiation is excessively deep and possibly infinite. in our projects.

Referenced under "Compiler performance" here: https://github.com/colinhacks/zod/releases/tag/v3.21.0

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[gksander]

@heggemsnes Will you run pnpm run changeset and add a minor-version changeset record (and push to this branch) on this so that we can cut a minor release with this change? Then we can get this released ASAP!

[heggemsnes]

Done!