i18n(hi): update astro-pages.mdx

[at-the-vr]

Description (required)

• add information about 500.astro and error props

referrence prs: #8495 #8573

Related issues & labels (optional)

• Suggested label: i18n

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hi	basics/astro-pages.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.

[dreyfus92]

Hey Atharva, awesome work. I believe this change is missing.