Fix: add GH_TOKEN to trigger workflow detect step

[pawel-kow]

Fix: GH_TOKEN missing in trigger workflow

Problem

The detect step in review-trigger.yml calls gh api to check whether a
push is an "Update branch" merge commit, but GH_TOKEN was not set in the
step's environment. This caused the workflow to exit with code 4:

gh: To use GitHub CLI in a GitHub Actions workflow, set the GH_TOKEN environment variable.

Fix

Added GH_TOKEN: ${{ github.token }} to the detect step's env and
permissions: contents: read at the job level (required for the commits API).

[github-actions]

❌ JSON Filename Check Failed

• File in subdirectory not allowed: .github/workflows/review-trigger.yml

[github-actions]

PR Description Check Failed

The PR description is missing required elements. Please update it according to the PR template.

Details

Labels to add: Checklist of common problems not complete, PR description incomplete, Test links missing
Labels to remove: Forged editor links

PR description check FAILED:
  FAIL  'Type of change' section not found
  FAIL  'How Has This Been Tested?' section not found
  FAIL  'Checklist of common problems' section not found
  FAIL  'Online Editor test results' section not found

[github-actions]

✅ JSON Schema Validation Passed

[github-actions]

Linter OK