chore(deps): update actions/checkout action to v6.0.3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	patch	v6.0.2 → v6.0.3

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Release Notes

actions/checkout (actions/checkout)

v6.0.3

Compare Source

• Fix checkout init for SHA-256 repositories by @​yaananth in #​2439
• fix: expand merge commit SHA regex and add SHA-256 test cases by @​yaananth in #​2414

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[github-actions]

Renovate PR Review Results

⚖️ Safety Assessment: ✅ Safe

🔍 Release Content Analysis

• Breaking changes: なし (パッチバージョンアップ v6.0.2 → v6.0.3)
• バグ修正:
  • SHA-256 リポジトリにおける checkout init の修正 (#2439)
  • merge commit SHA の正規表現拡張および SHA-256 テストケース追加 (#2414)
• 新機能: なし
• セキュリティ修正: なし (機能的バグ修正のみ)

🎯 Impact Scope Investigation

• 変更対象ファイル: 7ファイル、13箇所で actions/checkout が使用されている
  • .github/workflows/ci.yml (8箇所: build, lint, format, test, terraform-plan, renovate-review, deploy-preview-app, deploy-production-app 各ジョブ)
  • .github/workflows/auto-translate.yml (1箇所)
  • .github/workflows/claude.yml (1箇所)
  • .github/workflows/deploy-preview.yml (1箇所)
  • .github/workflows/deploy-production.yml (1箇所)
  • .github/workflows/shutdown-preview.yml (1箇所)
• SHA ピン留め: 旧 SHA de0fac2e4500dabe0009e67214ff5f5447ce83dd から新 SHA df4cb1c069e1874edd31b4311f1884172cec0e10 へ正しく更新されている
• 影響判断: 今回の修正は SHA-256 リポジトリ固有のバグ修正であり、このプロジェクトは通常の SHA-1 ベースのリポジトリのため実質的な動作変化はない
• 他依存への影響: なし

💡 Recommended Actions

• 特別な対応は不要
• そのままマージ可能

🔗 Reference Links

• actions/checkout CHANGELOG
• Fix PR #2439 - Fix checkout init for SHA-256 repositories
• Fix PR #2414 - expand merge commit SHA regex
• actions/checkout v6.0.2 → v6.0.3 比較

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