Fix board pre-validation workflow permission for PR comment publishing

[Copilot]

The Validate Board Files job was failing despite successful validation because the PR comment step hit 403 Resource not accessible by integration. The workflow had pull-requests: write but lacked permission required for Issue Comments API writes.

• Root cause

  • actions/github-script posts to POST /repos/{owner}/{repo}/issues/{number}/comments
  • Workflow token did not include issues: write

• Change

  • Updated workflow permissions in .github/workflows/board_pr_validation.yml to grant issue comment write access.

• Result

  • Validation can continue posting/updating board validation reports on PRs without failing due to token scope mismatch.

permissions:
  contents: read
  issues: write
  pull-requests: write

[xilinxgitops]

Can one of the admins verify this patch?

[github-actions]

🔍 Board Pre-Validation Report

No board files (under boards/) were changed in this pull request.