[dependency]: Bump dotenv

Bumps the faucet-authenticator-dependencies group in /faucet/authenticator with 1 update: [dotenv](https://github.com/motdotla/dotenv).


Updates `dotenv` from 16.4.5 to 16.4.7
- [Changelog](https://github.com/motdotla/dotenv/blob/master/CHANGELOG.md)
- [Commits](motdotla/dotenv@v16.4.5...v16.4.7)

---
updated-dependencies:
- dependency-name: dotenv
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: faucet-authenticator-dependencies
...

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