i18n(es): update upgrade-astro.mdx

[mxuee]

Description (required)

Update the upgrade-astro.mdx page in the Spanish documentation.

Reference

• 3cdd846
• 81ae90d

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es/upgrade-astro.mdx	Localization changed, will be marked as complete.

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.