Add missing actions: write permission to close-stale workflow

[Copilot]

Summary

Added the actions: write permission to the stale job in the .github/workflows/close-stale.yml workflow file.

Background

The actions/stale action requires the actions: write permission because it deletes its old cache before saving a new one. Without this permission, the action may fail or not function correctly when managing stale issues and pull requests.

Changes

• Added actions: write permission to the job-level permissions block in the stale job
• Positioned the permission before issues: write and pull-requests: write as per the natural order
• Included a trailing comment explaining why this permission is needed, matching the style of existing permission comments

The updated permissions block now includes:

permissions:
  actions: write # because actions/stale deletes its old cache before saving new one
  issues: write # required for closing stale issues
  pull-requests: write # required for closing stale PRs

Fixes the issue where the workflow was missing the necessary permissions for the stale action to fully manage its cache.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Add missing actions/stale permission</issue_title>
<issue_description>Check if any workflow jobs are using actions/stale.

If so, make sure that the permissions block for that job contains

actions: write

If any of the other permissions lines have trailing comments, then add a trailing comment for this one too:

actions: write # because actions/stale deletes its old cache before saving new one

Place this new permission in a specific order within the permissions, directly before both:

issues: write
pull-requests: write

(which implicitly means after contents: read)</issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes #34

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.