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

[dependabot[bot]]

Bumps symfony/mailer from 6.4.7 to 6.4.9.

Release notes

Sourced from symfony/mailer's releases.

v6.4.9

Changelog (https://github.com/symfony/mailer/compare/v6.4.8...v6.4.9)

• bug symfony/symfony#57569 [HttpClient][Mailer] Revert "Let curl handle transfer encoding", use HTTP/1.1 for Mailgun (@​nicolas-grekas)
• bug symfony/symfony#57499 [Mailer] Add additional headers in Scaleway bridge (@​MrMicky-FR)

v6.4.8

Changelog (https://github.com/symfony/mailer/compare/v6.4.7...v6.4.8)

• bug symfony/symfony#54572 [Mailer] Fix sendmail transport failure handling and interactive mode (@​bobvandevijver)
• bug symfony/symfony#54837 [Mailer] [Sendgrid] Use DataPart::getContentId() when DataPart::setContentId() is used (@​SherinBloemendaal)

Commits

• e2d56f1 Merge branch '5.4' into 6.4
• 13f4fac Fix typo: synchronous -> synchronously
• 7632642 Merge branch '5.4' into 6.4
• 54fec5a Revert "minor #54653 Auto-close PRs on subtree-splits (nicolas-grekas)"
• 085b7fd fix test
• 928a8d6 Merge branch '5.4' into 6.4
• 31d6641 bug #54572 [Mailer] Fix sendmail transport failure handling and interactive m...
• 1c39471 [Mailer] Fix sendmail transport failure handling and interactive mode
• 1b0ea6c Merge branch '5.4' into 6.4
• 0b6698e Remove calls to getMockForAbstractClass()
• Additional commits viewable in compare view

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