Bump eslint from 9.11.1 to 9.13.0 in /functions

Bumps [eslint](https://github.com/eslint/eslint) from 9.11.1 to 9.13.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](eslint/eslint@v9.11.1...v9.13.0)

---
updated-dependencies:
- dependency-name: eslint
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>