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 5.29.0 to 6.23.0
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v5.29.0...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

@@ -21,7 +21,7 @@
         "@actions/cache": "^4.0.5",
         "@actions/core": "^1.11.1",
         "@actions/exec": "^1.1.1",
-        "@actions/http-client": "^2.2.3",
+        "@actions/http-client": "^4.0.0",
         "@actions/io": "^1.1.3",
         "@actions/tool-cache": "^2.0.2"
     },