chore: add pull_requests: write permissions to sync workflow

[MikeMcC399]

• prerequisite to close issue Package manager versions outdated #590

Issue

The workflow Version Sync that keeps pinned versions up-to-date fails with

Error: Resource not accessible by integration

Change

Add the following permissions to Version Sync (sync.yml)

    permissions:
      pull-requests: write

Verification

Run the Version Sync manually and check that it ran successfully. It should create a PR to update config.json to latest versions:

Package Manager	config version	latest version
npm	10.9.1	11.0.0
pnpm	9.14.2	9.15.3
yarn	4.5.2	4.6.0

Additional step

Review and merge the PR created.