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
...

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

Author: dependabot[bot]

api/package-lock.json

@@ -28,7 +28,7 @@
     "fastify-file-upload": "^4.0.0",
     "mongodb": "^4.10.0",
     "node-cache": "^5.1.2",
-    "nodemailer": "^6.7.8",
+    "nodemailer": "^6.8.0",
     "reallydangerous": "^2.1.0",
     "sanitize-filename": "^1.6.3",
     "sharp": "^0.30.7",