fix(ci): add permissions for GitHub Actions workflow

Add write permissions for issues and pull-requests to fix
'Resource not accessible by integration' error when posting
comments from GitHub Actions.

Constitutional: Article VIII (Automation)

Author: hisaho

.github/workflows/constitutional-check.yml

@@ -13,6 +13,11 @@ on:
   push:
     branches: [main, develop]
 
+permissions:
+  contents: read
+  issues: write
+  pull-requests: write
+
 jobs:
   constitutional-check:
     name: Constitutional Check