Bump symfony/mailjet-mailer from 6.2.7 to 6.3.0

Bumps [symfony/mailjet-mailer](https://github.com/symfony/mailjet-mailer) from 6.2.7 to 6.3.0.
- [Release notes](https://github.com/symfony/mailjet-mailer/releases)
- [Commits](symfony/mailjet-mailer@v6.2.7...v6.3.0)

---
updated-dependencies:
- dependency-name: symfony/mailjet-mailer
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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