deps: bump undici from 6.21.0 to 7.1.0

Bumps [undici](https://github.com/nodejs/undici) from 6.21.0 to 7.1.0.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v6.21.0...v7.1.0)

---
updated-dependencies:
- dependency-name: undici
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

packages/gateway-conformance/package.json

@@ -75,7 +75,7 @@
     "kubo-rpc-client": "^5.0.2",
     "multiformats": "^13.3.1",
     "uint8arrays": "^5.1.0",
-    "undici": "^6.18.1"
+    "undici": "^7.1.0"
   },
   "browser": {
     "./dist/src/fixtures/create-kubo.js": "./dist/src/fixtures/create-kubo.browser.js",