Build(deps-dev): Bump the development-dependencies group with 4 updates

[julien-deramond]

@astrojs/markdown-remark (^6.3.2 → ^6.3.3)

• 6.3.3 Release Note
  • Adds support for TOML files to Astro's built-in; and we don't use TOML files.

@astrojs/mdx (^4.3.0 → ^4.3.1)

• 4.3.1 Release Note
  • Simple bump of dep

astro (^5.11.1 → ^5.12.0)

• 5.12.0 Release Note
  • We don't use experimental features so no rawEnvValues to add
  • Adds support for TOML files to Astro's built-in; and we don't use TOML files.

stylelint (^16.21.1 → ^16.22.0)

• 16.22.0
  • No linting errors so we're fine.