Fix: Add permission for approved-label workflow to label pull requests

[ayeshaaa0134]

Description of Change

Fixes #2719.

Added pull_request: write permission to the .github/workflows/approved-label.yml workflow file.
This change ensures the CI workflow can successfully add the "approved" label to pull requests, as described in the issue.

Checklist

• Added description of change
• Added file name matches File name guidelines
• Added tests and example, test must pass
• Added documentation so that the program is self-explanatory and educational - Doxygen guidelines
• Relevant documentation/comments is changed or added
• PR title follows semantic commit guidelines
• Search previous suggestions before making a new one, as yours may be a duplicate.
• I acknowledge that all my contributions will be made under the project's license.

Notes: Added the required permission to allow the workflow to add labels to pull requests, resolving the problem in #2719.

[realstealthninja]

fixed by #3016