fix: enhance PR comment body handling in scope check workflow

This commit improves the GitHub Actions workflow for PR scope checks by:
- Adding a step to set the comment body with detailed information about scope validation failures.
- Updating the comment creation step to utilize the newly set comment body, ensuring accurate and informative feedback for PR authors.

These changes aim to provide clearer communication regarding scope issues in pull requests.

Author: shiron-dev

.github/workflows/check_pr_scope.yml

@@ -44,12 +44,17 @@ jobs:
     permissions:
       pull-requests: write
     steps:
+      - name: Set comment body
+        id: set_comment_body
+        run: |
+          echo "comment_body=PRのスコープが正しくありません。\nタイトル: ${{ needs.check_scope.outputs.title }}\n変更ファイル: ${{ needs.check_scope.outputs.files }}" >> $GITHUB_OUTPUT
+
       - name: Comment on PR
         uses: actions/github-script@v7
         with:
           github-token: ${{secrets.GITHUB_TOKEN}}
           script: |
-            const body = `${process.env.comment_body}`;
+            const body = `${{ steps.set_comment_body.outputs.comment_body }}`;
             github.rest.issues.createComment({
               issue_number: context.issue.number,
               owner: context.repo.owner,