docs: Specify macOS support for WebView2

[morning4coffe-dev]

GitHub Issue (If applicable): https://github.com/unoplatform/uno/discussions/17990

PR Type

What kind of change does this PR introduce?

• Documentation content changes

What is the current behavior?

Currently this is a bit confusing between mac desktop and mac catalyst in WebView docs.

PR Checklist

Please check if your PR fulfills the following requirements:

• [x] Docs have been added/updated which fit documentation template (for bug fixes / features)
• [ ] Unit Tests and/or UI Tests for the changes have been added (for bug fixes / features) (if applicable)
• [ ] Validated PR Screenshots Compare Test Run results.
• [x] Contains NO breaking changes
• [x] Associated with an issue (GitHub or internal) and uses the automatic close keywords.
• [x] Commits must be following the Conventional Commits specification.