Upstream update: winforms

[github-actions]

Automation detected pending upstream changes for winforms.

• Issue key: winforms
• Affected skills: winforms
• Pending upstream watches: 1

Pending upstream sources:

• winforms-overview-docs | http_document | learn.microsoft.comdotnet/desktop/winforms/overview documentation
  • Source: https://learn.microsoft.com/dotnet/desktop/winforms/overview/
  • Current value: "5UzULrJ5/1TDhw5dkpzvHRu/Evo="
  • Detail: What is Windows Forms - Windows Forms | Microsoft Learn | ETag "5UzULrJ5/1TDhw5dkpzvHRu/Evo="

Why this matters:

• Review the linked skills when https://learn.microsoft.com/dotnet/desktop/winforms/overview/ changes.

Suggested follow-up:

• Review the upstream release notes or documentation diff
• Update the affected files under skills/
• Update README.md if framework coverage or guidance changed
• Close this issue after the catalog has been refreshed