Bump undici from 7.14.0 to 7.15.0

Bumps [undici](https://github.com/nodejs/undici) from 7.14.0 to 7.15.0.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](https://github.com/nodejs/undici/compare/v7.14.0...v7.15.0)

---
updated-dependencies:
- dependency-name: undici
  dependency-version: 7.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -32,7 +32,7 @@
     "@octokit/plugin-rest-endpoint-methods": "^16.0.0",
     "@renovatebot/pep440": "^4.2.0",
     "smol-toml": "^1.4.2",
-    "undici": "^7.14.0"
+    "undici": "^7.15.0"
   },
   "devDependencies": {
     "@biomejs/biome": "2.1.4",