Description
Features related to third-party services or products must be documented in the README file of the corresponding package.
The changes introduced in #60209 must be documented in this file: https://github.com/symfony/symfony/blob/7.4/src/Symfony/Component/Notifier/Bridge/Slack/README.md
To do that, please open a pull request in this repository and add the new documentation to the file.
Thanks!
Example
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