Fix Next.js 13 host being stubborn when relying on `req.url`

[jpwilliams]

Summary

After debugging with #391, this PR fixes Next.js 13 sometimes being very stubborn when we want to rely on its req.url property.

Checklist

• [ ] Added a docs PR that references this PR N/A Bug fix
• [ ] Added unit/integration tests N/A
• [x] Added changesets if applicable

Related

• Used #391 for debugging - closing this

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 6d867caf06a9137f837cf4ee05f35ee39a651213

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ------- | ----- | | inngest | Patch |

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