chore: change pr-agent permission

[kaitoyama]

PR Type

configuration changes

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Description

• ワークフローの権限設定をジョブレベルからワークフローレベルに移動しました。
• issues, pull-requests, contentsの権限をwriteに設定しました。

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Changes walkthrough 📝

	Relevant files
Configuration changes	pr-agent.yml ワークフローの権限設定の変更                                                                                      .github/workflows/pr-agent.yml 追加されたpermissionsセクションをジョブレベルからワークフローレベルに移動 issues, pull-requests, contentsの権限をwriteに設定 +5/-4

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💡 PR-Agent usage:
Comment /help on the PR to get a list of all available PR-Agent tools and their descriptions

[github-actions]

PR Reviewer Guide 🔍

⏱️ Estimated effort to review [1-5]	2
🧪 Relevant tests	No
🔒 Security concerns	Sensitive information exposure: - 権限設定が`write`に変更されたことにより、潜在的なセキュリティリスクがあります。特に`issues`, `pull-requests`, `contents`に対する権限が強化されているため、不正な変更やデータの漏洩が起こる可能性があります。適切な監視と制限が必要です。
⚡ Key issues to review	None

[kaitoyama]

/help

[github-actions]

PR Agent Walkthrough 🤖

Welcome to the PR Agent, an AI-powered tool for automated pull request analysis, feedback, suggestions and more.

Here is a list of tools you can use to interact with the PR Agent:

Tool	Description	Trigger Interactively 💎
DESCRIBE	Generates PR description - title, type, summary, code walkthrough and labels	Run
REVIEW	Adjustable feedback about the PR, possible issues, security concerns, review effort and more	Run
IMPROVE	Code suggestions for improving the PR	Run
UPDATE CHANGELOG	Automatically updates the changelog	Run
ADD DOCS 💎	Generates documentation to methods/functions/classes that changed in the PR	Run
TEST 💎	Generates unit tests for a specific component, based on the PR code change	Run
IMPROVE COMPONENT 💎	Code suggestions for a specific component that changed in the PR	Run
ANALYZE 💎	Identifies code components that changed in the PR, and enables to interactively generate tests, docs, and code suggestions for each component	Run
ASK	Answering free-text questions about the PR	[*]
GENERATE CUSTOM LABELS 💎	Generates custom labels for the PR, based on specific guidelines defined by the user	[*]
CI FEEDBACK 💎	Generates feedback and analysis for a failed CI job	[*]
CUSTOM PROMPT 💎	Generates custom suggestions for improving the PR code, derived only from a specific guidelines prompt defined by the user	[*]
SIMILAR ISSUE	Automatically retrieves and presents similar issues	[*]

(1) Note that each tool be triggered automatically when a new PR is opened, or called manually by commenting on a PR.

(2) Tools marked with [*] require additional parameters to be passed. For example, to invoke the /ask tool, you need to comment on a PR: /ask "<question content>". See the relevant documentation for each tool for more details.

[kaitoyama]

/improve

[github-actions]

Failed to generate code suggestions for PR