Bump phpmailer/phpmailer from 6.6.5 to 6.7 in /web/inc (hestiacp#3111)

Bumps [phpmailer/phpmailer](https://github.com/PHPMailer/PHPMailer) from 6.6.5 to 6.7.
- [Release notes](https://github.com/PHPMailer/PHPMailer/releases)
- [Changelog](https://github.com/PHPMailer/PHPMailer/blob/master/changelog.md)
- [Commits](PHPMailer/PHPMailer@v6.6.5...v6.7)

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

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]