Fix SymfonyAdapter dispatch method typing

[provokateurin]

Summary

Split out from #37390

Adapt it to https://github.com/symfony/event-dispatcher-contracts/blob/0ad3b6f1e4e2da5690fefe075cd53a238646d8dd/EventDispatcherInterface.php

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[come-nc]

I’m lost, the interface you link to has the parameters in reverse order, that cannot be the one we implement here, right?