ci: update configuration reference docs

[astrobot-houston]

This PR is auto-generated by a nightly GitHub action to update the reference docs from source code in withastro/astro.

[astrobot-houston]

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reference/configuration-reference.mdx	Source changed, localizations will be marked as outdated.

Warnings reference

Icon	Description
🔄️	The source for this localization has been updated since the creation of this pull request, make sure all changes in the source have been applied.

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[ArmandPhilippot]

The preview looks fine to me but we need to wait for withastro/astro#18120 before merging this!