Update dependency @astrojs/starlight to ^0.40.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@astrojs/starlight (source)	^0.39.2 → ^0.40.0

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Release Notes

withastro/starlight (@​astrojs/starlight)

v0.40.0

Compare Source

Minor Changes

• #​3923 edf2e6b Thanks @​Princesseuh! - Adds support for Astro 6.4 and the new Sätteri Markdown processor.

  It is now possible to opt into using Astro's 6.4 Sätteri Markdown processor by installing the @astrojs/markdown-satteri package and configuring it in your astro.config.mjs file:

  // astro.config.mjs
  
  import { defineConfig } from 'astro/config';
  import { satteri } from '@​astrojs/markdown-satteri';
  
  export default defineConfig({
    markdown: {
      processor: satteri(),
    },
  });

  ⚠️ BREAKING CHANGE: The minimum supported version of Astro is now v6.4.5.

  Please update Starlight and Astro together:

  npx @​astrojs/upgrade

  Community Starlight plugins and Astro integrations may also need to be manually updated to work with Sätteri. If you encounter any issues, please reach out to the plugin or integration author to see if it is a known issue or if an updated version is being worked on.

Patch Changes

• #​3923 edf2e6b Thanks @​Princesseuh! - Updates Expressive Code to version 0.43.1.

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