Bump nodemailer from 6.7.8 to 6.8.0 in /api

Bumps [nodemailer](https://github.com/nodemailer/nodemailer) from 6.7.8 to 6.8.0.
- [Release notes](https://github.com/nodemailer/nodemailer/releases)
- [Changelog](https://github.com/nodemailer/nodemailer/blob/master/CHANGELOG.md)
- [Commits](nodemailer/nodemailer@v6.7.8...v6.8.0)

---
updated-dependencies:
- dependency-name: nodemailer
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]