Fix event key hash assuming hex

[goodoldneon]

Summary

Fix event key hasher assuming the event key is a hex string

Checklist

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

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: f6bd9ab3a79a05ad393ca36750134e153f196ce8

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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