Update dependency undici to v6.4.0 (#669)

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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)) | [`6.3.0` -> `6.4.0`](https://renovatebot.com/diffs/npm/undici/6.3.0/6.4.0) | [![age](https://developer.mend.io/api/mc/badges/age/npm/undici/6.4.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/undici/6.4.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/undici/6.3.0/6.4.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/undici/6.3.0/6.4.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

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

### [`v6.4.0`](https://togithub.com/nodejs/undici/releases/tag/v6.4.0)

[Compare Source](https://togithub.com/nodejs/undici/compare/v6.3.0...v6.4.0)

##### What's Changed

-   refactor: version cleanup by [@&#8203;tsctx](https://togithub.com/tsctx) in [nodejs/undici#2605
-   cacheStorage: separate matchAll logic by [@&#8203;KhafraDev](https://togithub.com/KhafraDev) in [nodejs/undici#2599
-   cleanup index by [@&#8203;KhafraDev](https://togithub.com/KhafraDev) in [nodejs/undici#2598
-   feat: port `balanced-pool`, `ca-fingerprint`, `client-abort` tests to `node:test` by [@&#8203;sosukesuzuki](https://togithub.com/sosukesuzuki) in [nodejs/undici#2584
-   ci: unpin nodejs workflow version by [@&#8203;dominykas](https://togithub.com/dominykas) in [nodejs/undici#2434
-   test([#&#8203;2600](https://togithub.com/nodejs/undici/issues/2600)): Flaky debug test by [@&#8203;metcoder95](https://togithub.com/metcoder95) in [nodejs/undici#2607
-   fix: h2 hang issue with empty body by [@&#8203;timursevimli](https://togithub.com/timursevimli) in [nodejs/undici#2601
-   Fix tests for Node.js v21 by [@&#8203;sosukesuzuki](https://togithub.com/sosukesuzuki) in [nodejs/undici#2609
-   perf(cache): avoid Request and Response initialization by [@&#8203;tsctx](https://togithub.com/tsctx) in [nodejs/undici#2610
-   Add more libraries to benchmarks by [@&#8203;mcollina](https://togithub.com/mcollina) in [nodejs/undici#2614
-   feat: port `client-connect`, `client-dispatch`, `client-errors` test to `node:test` by [@&#8203;sosukesuzuki](https://togithub.com/sosukesuzuki) in [nodejs/undici#2591
-   exit with 1 if WPT runner has unexpected errors by [@&#8203;KhafraDev](https://togithub.com/KhafraDev) in [nodejs/undici#2621
-   Fix tests for Node.js v20.11.0 by [@&#8203;mcollina](https://togithub.com/mcollina) in [nodejs/undici#2618
-   fix(mock-agent): split set-cookie by [@&#8203;tsctx](https://togithub.com/tsctx) in [nodejs/undici#2619
-   feat: implement throwOnMaxRedirect option for RedirectHandler by [@&#8203;mertcanaltin](https://togithub.com/mertcanaltin) in [nodejs/undici#2563
-   test: fix flaky debug test by [@&#8203;metcoder95](https://togithub.com/metcoder95) in [nodejs/undici#2613
-   fix: hide statusOutput if empty in handleRunnerCompletion by [@&#8203;Uzlopak](https://togithub.com/Uzlopak) in [nodejs/undici#2624
-   docs: Fix typo in Debug.md by [@&#8203;Skn0tt](https://togithub.com/Skn0tt) in [nodejs/undici#2625
-   fix(cache): set AbortSignal by [@&#8203;tsctx](https://togithub.com/tsctx) in [nodejs/undici#2612
-   Use correct http Agent for node-fetch, axios, got and request by [@&#8203;mcollina](https://togithub.com/mcollina) in [nodejs/undici#2629

##### New Contributors

-   [@&#8203;timursevimli](https://togithub.com/timursevimli) made their first contribution in [nodejs/undici#2601
-   [@&#8203;mertcanaltin](https://togithub.com/mertcanaltin) made their first contribution in [nodejs/undici#2563
-   [@&#8203;Skn0tt](https://togithub.com/Skn0tt) made their first contribution in [nodejs/undici#2625

**Full Changelog**: nodejs/undici@v6.3.0...v6.4.0

</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": "6.3.0",
+ "undici": "6.4.0",
  "unistore": "3.5.2",
  "util": "0.12.5",
  "uuid": "9.0.1",