Composer(deps): Bump symfony/mailer from 6.4.7 to 6.4.9 in /web (sbpp…

…#978)

Bumps [symfony/mailer](https://github.com/symfony/mailer) from 6.4.7 to 6.4.9.
- [Release notes](https://github.com/symfony/mailer/releases)
- [Changelog](https://github.com/symfony/mailer/blob/7.1/CHANGELOG.md)
- [Commits](symfony/mailer@v6.4.7...v6.4.9)

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

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