Update dependency @astrojs/mdx to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@astrojs/mdx (source)	^3.1.7 -> ^4.0.0

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Release Notes

withastro/astro (@​astrojs/mdx)

v4.0.2

Compare Source

Patch Changes

• Updated dependencies [f13417b, 87231b1, a71e9b9]:
  • @​astrojs/markdown-remark@​6.0.1

v4.0.1

Compare Source

Patch Changes

• #​12594 4f2fd0a Thanks @​Princesseuh! - Fixes compatibility with Astro 5

v4.0.0

Compare Source

Major Changes

• #​12231 90ae100 Thanks @​bluwy! - Handles the breaking change in Astro where content pages (including .mdx pages located within src/pages/) no longer respond with charset=utf-8 in the Content-Type header.

  For MDX pages without layouts, @astrojs/mdx will automatically add the <meta charset="utf-8"> tag to the page by default. This reduces the boilerplate needed to write with non-ASCII characters. If your MDX pages have a layout, the layout component should include the <meta charset="utf-8"> tag.

  If you require charset=utf-8 to render your page correctly, make sure that your layout components have the <meta charset="utf-8"> tag added.

• #​12008 5608338 Thanks @​Princesseuh! - Welcome to the Astro 5 beta! This release has no changes from the latest alpha of this package, but it does bring us one step closer to the final, stable release.

  Starting from this release, no breaking changes will be introduced unless absolutely necessary.

  To learn how to upgrade, check out the Astro v5.0 upgrade guide in our beta docs site.

Minor Changes

• #​12539 827093e Thanks @​bluwy! - Drops node 21 support

• #​11741 6617491 Thanks @​bluwy! - Updates adapter server entrypoint to use @astrojs/mdx/server.js

  This is an internal change. Handling JSX in your .mdx files has been moved from Astro internals and is now the responsibility of this integration. You should not notice a change in your project, and no update to your code is required.

Patch Changes

• #​12075 a19530e Thanks @​bluwy! - Parses frontmatter ourselves

• #​11861 3ab3b4e Thanks @​bluwy! - Updates @astrojs/markdown-remark and handle its breaking changes

• #​12533 1b61fdf Thanks @​ematipico! - Fixes a case where the MDX renderer couldn't be loaded when used as a direct dependency of an Astro integration.

• Updated dependencies [3ab3b4e, 5608338, 560ef15, 83a2a64, 3ab3b4e, a19530e]:

  • @​astrojs/markdown-remark@​6.0.0

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