Copilot Skills: Release note generation skill should also quote co-authors (#45819)

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fix/what does it change/how was it tested (even manually, if necessary)?
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## Summary of the Pull Request

Release note generation skill add support for quoting co-authors

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## PR Checklist

- [ ] Closes: #xxx
<!-- - [ ] Closes: #yyy (add separate lines for additional resolved
issues) -->
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

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or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

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wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed

Result may vary because of uncertainty of LLM, while I can get this
result during my tests

<img width="696" height="147" alt="image"
src="https://github.com/user-attachments/assets/9d20670f-b9fb-4630-b6b4-f94c2a5d2284"
/>

.github/skills/release-note-generation/SKILL.md

@@ -33,7 +33,7 @@ Generated Files/ReleaseNotes/
 
 ## Prerequisites
 
-- GitHub CLI (`gh`) installed and authenticated
+- **GitHub CLI (`gh`) installed and authenticated** — The collection script uses `gh pr view` and `gh api graphql` to fetch PR metadata and co-author information. Run `gh auth status` to verify; if not logged in, run `gh auth login` first. See [Step 1.0.0](./references/step1-collection.md) for details.
 - MCP Server: github-mcp-server installed
 - GitHub Copilot code review enabled for the org/repo
 
@@ -49,6 +49,10 @@ Generated Files/ReleaseNotes/
 
 ```
 ┌────────────────────────────────┐
+│ 1.0 Verify gh auth + MemberList │
+└────────────────────────────────┘
+              ↓
+┌────────────────────────────────┐
 │ 1.1 Collect PRs (stable range) │
 └────────────────────────────────┘
               ↓
@@ -85,6 +89,7 @@ Generated Files/ReleaseNotes/
 
 | Step | Action | Details |
 |------|--------|---------|
+| 1.0 | Verify prerequisites | `gh auth status` must pass; generate MemberList.md |
 | 1.1 | Collect PRs | From previous release tag on `stable` branch → `sorted_prs.csv` |
 | 1.2 | Assign Milestones | Ensure all PRs have correct milestone |
 | 2.1–2.4 | Label PRs | Auto-suggest + human label low-confidence |