fix: Bump WinAppSdk reference version (backport #1752)

[mergify]

This is an automatic backport of pull request #1752 done by Mergify.
Cherry-pick of 7c16436 has failed:

On branch mergify/bp/legacy/2x/pr-1752
Your branch is up to date with 'origin/legacy/2x'.

You are currently cherry-picking commit 7c164362.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   samples/Playground/Directory.Packages.props
	modified:   src/Directory.Packages.props
	modified:   src/Uno.Extensions.RuntimeTests/Uno.Extensions.RuntimeTests.Windows/Uno.Extensions.RuntimeTests.Windows.csproj

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   samples/MauiEmbedding/Directory.Packages.props
	deleted by us:   src/Uno.Extensions.Navigation.UI.Markup/Uno.Extensions.Navigation.WinUI.Markup.csproj
	deleted by us:   src/Uno.Extensions.Reactive.UI.Markup/Uno.Extensions.Reactive.WinUI.Markup.csproj
	both modified:   testing/TestHarness/Directory.Packages.props

Cherry-pick of e9908ec has failed:

On branch mergify/bp/legacy/2x/pr-1752
Your branch is ahead of 'origin/legacy/2x' by 1 commit.
  (use "git push" to publish your local commits)

You are currently cherry-picking commit e9908ec1.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   src/Uno.Extensions.Reactive.Tests/Given_ListFeed.cs

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   src/Uno.Extensions.Reactive.Tests/Sources/Given_DynamicFeed.cs

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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