Update dependency laravel/horizon to v5.9.4

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
laravel/horizon	require	patch	5.9.3 -> 5.9.4

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Release Notes

laravel/horizon

### [`v5.9.4`](https://togithub.com/laravel/horizon/blob/HEAD/CHANGELOG.md#v594-httpsgithubcomlaravelhorizoncomparev593v594---2022-03-29) [Compare Source](https://togithub.com/laravel/horizon/compare/v5.9.3...v5.9.4) ##### Changed - change chart.js intersect mode to false by [@​swist666](https://togithub.com/swist666) in [https://github.com/laravel/horizon/pull/1133](https://togithub.com/laravel/horizon/pull/1133)

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