docs: Update targets.mdx fixed a single typo (Middeleware to middleware)

[real-charlie]

Why

typo

What

fixed a typo

Checklist

Changed middeleware to middleware

• Documentation updated
• Demo added
• Ready to be merged

[changeset-bot]

⚠️ No Changeset found

Latest commit: 950485b

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Name	Status	Preview	Updated
react-spring	✅ Ready (Inspect)	Visit Preview	Dec 17, 2022 at 8:26AM (UTC)

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[joshuaellis]

Thanks!