Update dependency undici to v6.16.1 (#1004)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [undici](https://undici.nodejs.org) ([source](https://togithub.com/nodejs/undici)) | [`6.16.0` -> `6.16.1`](https://renovatebot.com/diffs/npm/undici/6.16.0/6.16.1) | [![age](https://developer.mend.io/api/mc/badges/age/npm/undici/6.16.1?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/undici/6.16.1?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/undici/6.16.0/6.16.1?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/undici/6.16.0/6.16.1?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>nodejs/undici (undici)</summary>

### [`v6.16.1`](https://togithub.com/nodejs/undici/releases/tag/v6.16.1)

[Compare Source](https://togithub.com/nodejs/undici/compare/v6.16.0...v6.16.1)

#### What's Changed

-   fix some typos by [@&#8203;Uzlopak](https://togithub.com/Uzlopak) in [https://github.com/nodejs/undici/pull/3217](https://togithub.com/nodejs/undici/pull/3217)
-   websocket: move codeblock in parseCloseBody by [@&#8203;Uzlopak](https://togithub.com/Uzlopak) in [https://github.com/nodejs/undici/pull/3215](https://togithub.com/nodejs/undici/pull/3215)
-   fetch: enable wpt test request-referrer.any.js by [@&#8203;Uzlopak](https://togithub.com/Uzlopak) in [https://github.com/nodejs/undici/pull/3223](https://togithub.com/nodejs/undici/pull/3223)
-   fetch: wpt add /fetch/api/resources/cache.py to server.mjs by [@&#8203;Uzlopak](https://togithub.com/Uzlopak) in [https://github.com/nodejs/undici/pull/3225](https://togithub.com/nodejs/undici/pull/3225)
-   add pipe support for wpt server by [@&#8203;KhafraDev](https://togithub.com/KhafraDev) in [https://github.com/nodejs/undici/pull/3228](https://togithub.com/nodejs/undici/pull/3228)
-   test: reduce the number of requests in `fire-and-forget.js` by [@&#8203;tsctx](https://togithub.com/tsctx) in [https://github.com/nodejs/undici/pull/3229](https://togithub.com/nodejs/undici/pull/3229)
-   ci: add node 22 in ci test matrix, use 22 for coverage by [@&#8203;Uzlopak](https://togithub.com/Uzlopak) in [https://github.com/nodejs/undici/pull/3226](https://togithub.com/nodejs/undici/pull/3226)
-   fetch: don't set an invalid origin header by [@&#8203;KhafraDev](https://togithub.com/KhafraDev) in [https://github.com/nodejs/undici/pull/3235](https://togithub.com/nodejs/undici/pull/3235)
-   fail wpt runner if expected failures does not match actual by [@&#8203;KhafraDev](https://togithub.com/KhafraDev) in [https://github.com/nodejs/undici/pull/3236](https://togithub.com/nodejs/undici/pull/3236)
-   fix: ignore content-length when dumping HEAD by [@&#8203;ronag](https://togithub.com/ronag) in [https://github.com/nodejs/undici/pull/3222](https://togithub.com/nodejs/undici/pull/3222)

**Full Changelog**: nodejs/undici@v6.16.0...v6.16.1

</details>

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packages/next/package.json

@@ -279,7 +279,7 @@
     "timers-browserify": "2.0.12",
     "tty-browserify": "0.0.1",
     "ua-parser-js": "1.0.37",
-    "undici": "6.16.0",
+    "undici": "6.16.1",
     "unistore": "3.5.2",
     "util": "0.12.5",
     "uuid": "9.0.1",