[Delegation Toolkit] Update tutorial

[AyushBherwani1998]

Description

Update the tutorial code snippet

Issue(s) fixed

Fixes #

Preview

Checklist

• If this PR updates or adds documentation content that changes or adds technical meaning, it has received an approval from an engineer or DevRel from the relevant team.
• If this PR updates or adds documentation content, it has received an approval from a technical writer.

---

Note

Updates tutorial snippet to hex-encode credential.id for P256Owner.keyId using Viem’s toHex.

• Tutorial update (src/pages/tutorials/use-passkey-as-backup-signer.md):
  • In "Add the passkey as a backup signer" snippet:
    • Import toHex from viem.
    • Set p256Owner.keyId to toHex(credential.id) instead of credential.id.

^{Written by Cursor Bugbot for commit 19655ab. This will update automatically on new commits. Configure here.}

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Project	Deployment	Preview	Comments	Updated (UTC)
metamask-docs	Ready	Preview	Comment	Oct 20, 2025 6:37pm

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[bgravenorst]

lgtm