chore: update dependency astro to v5.17.3

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
astro (source)	5.17.1 → 5.17.3

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Release Notes

withastro/astro (astro)

v5.17.3

Compare Source

Patch Changes

• #​15564 522f880 Thanks @​matthewp! - Add a default body size limit for server actions to prevent oversized requests from exhausting memory.

• #​15569 e01e98b Thanks @​matthewp! - Respect image allowlists when inferring remote image sizes and reject remote redirects.

v5.17.2

Compare Source

Patch Changes

• c13b536 Thanks @​matthewp! - Improves Host header handling for SSR deployments behind proxies

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• package.json

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📝 Walkthrough

ウォークスルー

package.jsonのastro開発依存関係がバージョン5.17.1から5.17.3に更新されました。その他のロジック、エラーハンドリング、制御フローの変更はありません。

変更内容

コホート / ファイル	概要
依存関係の更新 package.json	astro開発依存関係をバージョン5.17.1から5.17.3に更新

推定コードレビュー工数

🎯 1 (Trivial) | ⏱️ ~2分

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