Bump undici and @actions/http-client

Bumps [undici](https://github.com/nodejs/undici) to 6.23.0 and updates ancestor dependency [@actions/http-client](https://github.com/actions/toolkit/tree/HEAD/packages/http-client). These dependencies need to be updated together.


Updates `undici` from 5.28.4 to 6.23.0
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v5.28.4...v6.23.0)

Updates `@actions/http-client` from 2.2.3 to 4.0.0
- [Changelog](https://github.com/actions/toolkit/blob/main/packages/http-client/RELEASES.md)
- [Commits](https://github.com/actions/toolkit/commits/@actions/cache@4.0.0/packages/http-client)

---
updated-dependencies:
- dependency-name: undici
  dependency-version: 6.23.0
  dependency-type: indirect
- dependency-name: "@actions/http-client"
  dependency-version: 4.0.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

package-lock.json

@@ -26,7 +26,7 @@
   "license": "MIT",
   "dependencies": {
     "@actions/core": "^1.11.1",
-    "@actions/http-client": "^2.2.3",
+    "@actions/http-client": "^4.0.0",
     "@actions/io": "^1.1.3",
     "yaml": "^2.6.1",
     "zod": "^3.23.8"