build(deps): bump undici and @actions/github

Bumps [undici](https://github.com/nodejs/undici) to 6.27.0 and updates ancestor dependency [@actions/github](https://github.com/actions/toolkit/tree/HEAD/packages/github). These dependencies need to be updated together.


Updates `undici` from 6.25.0 to 6.27.0
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](https://github.com/nodejs/undici/compare/v6.25.0...v6.27.0)

Updates `@actions/github` from 7.0.0 to 9.1.1
- [Changelog](https://github.com/actions/toolkit/blob/main/packages/github/RELEASES.md)
- [Commits](https://github.com/actions/toolkit/commits/HEAD/packages/github)

---
updated-dependencies:
- dependency-name: undici
  dependency-version: 6.27.0
  dependency-type: indirect
- dependency-name: "@actions/github"
  dependency-version: 9.1.1
  dependency-type: direct:production
...

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

package.json

@@ -39,7 +39,7 @@
   "dependencies": {
     "@actions/cache": "^5.0.5",
     "@actions/core": "^2.0.3",
-    "@actions/github": "^7.0.0",
+    "@actions/github": "^9.1.1",
     "@octokit/core": "^5.2.2",
     "@octokit/plugin-retry": "^6.1.0",
     "lodash.deburr": "^4.1.0",