chore(deps): update dependency graham-campbell/markdown to v15.2.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
graham-campbell/markdown	15.1.0 -> 15.2.0

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Release Notes

GrahamCampbell/Laravel-Markdown (graham-campbell/markdown)

### [`v15.2.0`](https://togithub.com/GrahamCampbell/Laravel-Markdown/releases/tag/v15.2.0): V15.2 (17/03/2024) [Compare Source](https://togithub.com/GrahamCampbell/Laravel-Markdown/compare/v15.1.0...v15.2.0) - Added Laravel 11 support

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Configuration

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