build(deps): bump nodemailer

build(deps): bump nodemailer

Bumps the regular group with 1 update in the /examples/typescript/smtp-client-pool directory: [nodemailer](https://github.com/nodemailer/nodemailer).

Updates `nodemailer` from 6.9.14 to 6.9.15
- [Release notes](https://github.com/nodemailer/nodemailer/releases)
- [Changelog](https://github.com/nodemailer/nodemailer/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nodemailer/nodemailer/compare/v6.9.14...v6.9.15)

---
updated-dependencies:
- dependency-name: nodemailer
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: regular
...

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