[Snyk] Security upgrade astro from 6.3.8 to 6.4.8

[aymericzip]

Snyk has created this PR to fix 1 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• examples/astro-react-app/package.json

Vulnerabilities that will be fixed with an upgrade:

	Issue
	Use of Non-Canonical URL Paths for Authorization Decisions SNYK-JS-ASTRO-17901336

Breaking Change Risk

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[aymericzip]

This minor version upgrade from Astro 6.3.8 to 6.4.8 introduces new features and deprecations but contains no immediate breaking changes.

Key Changes:

• New Markdown Processor API: Astro v6.4 introduces a new markdown.processor API. However, the default processor remains unchanged, ensuring existing projects continue to work without modification.
• Configuration Deprecation: Top-level markdown configurations (e.g., markdown.remarkPlugins, markdown.rehypePlugins) are now deprecated. While they still work in this version, they are scheduled for removal in Astro 8.0. The new recommendation is to configure these plugins directly on the markdown processor.
• New Features: The release adds an optional, high-performance Rust-based Markdown processor called Sätteri and new Cloudflare helpers for advanced routing.

No mandatory code modifications are required for this upgrade. The changes are additive, and the deprecations provide a long-term migration path.

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