Update dependency laravel/slack-notification-channel to v3.3.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
laravel/slack-notification-channel	3.3.0 -> 3.3.1

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Release Notes

laravel/slack-notification-channel (laravel/slack-notification-channel)

### [`v3.3.1`](https://togithub.com/laravel/slack-notification-channel/blob/HEAD/CHANGELOG.md#v331---2024-08-17) [Compare Source](https://togithub.com/laravel/slack-notification-channel/compare/v3.3.0...v3.3.1) - fix: do not notify when route is empty by [@​TomaszOnePilot](https://togithub.com/TomaszOnePilot) in [https://github.com/laravel/slack-notification-channel/pull/96](https://togithub.com/laravel/slack-notification-channel/pull/96)

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