docs(ar): update on-demand deploy tag

[royy92]

Description (required)

What

Update the Arabic translation of the deploy guide tag from SSR التصيير على الخادم to التصيير عند الطلب.

Why

The English label was updated to "On demand", but the Arabic translation still referred to the older "SSR" wording. This makes the Arabic label more consistent with the current terminology used in the docs.

How

Updated the deploy.ssrTag translation in src/content/i18n/ar.yml.

Test

• Ran the docs locally with pnpm dev.
• Verified the updated Arabic label appears in the deploy guide navigation.

Related issues & labels (optional)

• Related to RTL handling on fallback pages #12777.
• Suggested label: site improvement

Note

This PR focuses on the translation update discussed in #12777.

The RTL/BiDi rendering behavior mentioned in the issue was not addressed here, as there does not yet appear to be a confirmed implementation approach in the discussion.

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Tracked Files

File	Note
src/content/i18n/ar.yml	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.

[github-actions]

Preview deployment

✅ Deployment complete!

• Latest commit: 982c765
• Preview: https://docs-ar-update-on-demand-tag.previews.docs.astro.build
• Workflow run: View logs

[yanthomasdev]

LGTM! Thanks!