fix(deps): bump undici from 6.14.1 to 6.15.0

Bumps [undici](https://github.com/nodejs/undici) from 6.14.1 to 6.15.0.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v6.14.1...v6.15.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -17,7 +17,7 @@
   "dependencies": {
     "@actions/core": "^1.10.1",
     "octokit": "^3.2.0",
-    "undici": "^6.14.1"
+    "undici": "^6.15.0"
   },
   "release": {
     "branches": [