Update Modern .NET UWP app docs (#5895)

* Fix GeneratedBindableCustomProperty tip formatting

Add missing blockquote prefix on tip content line so text renders
inside the tip bubble instead of below it. Also fix missing word 'on'
in the sentence.

Co-authored-by: Copilot <[email protected]>

* Update PublishAot text

* PR feedback

---------

Co-authored-by: Copilot <[email protected]>

Author: tommcdon

uwp/dotnet-native/modernize-uwp-apps-with-dotnet.md

@@ -101,7 +101,7 @@ UWP modern .NET projects use SDK-style .csproj files with key properties:
 - **UseUwp**: References WinRT projections for Windows.UI.Xaml types and configures CsWinRT for UWP compatibility
 - **UseUwpTools**: Enables UWP-specific tooling including XAML compiler, project capabilities, and MSIX packaging.  Note this property is enabled by default when `UseUwp` is enabled.
 - **EnableMsixTooling**: Enables single-project MSIX support (no separate packaging project needed)
-- **PublishAot**: Enables Native AOT compilation (required for Microsoft Store publication)
+- **PublishAot**: Enables Native AOT compilation
 - **DisableRuntimeMarshalling**: Optimizes performance for Native AOT scenarios
 
 ## Migrating Existing UWP Apps to Modern .NET
@@ -111,7 +111,7 @@ To migrate an existing UWP app from [.NET Native](index.md) to modern .NET:
 ### Step 1: Update Project File
 
 1. Convert your existing .csproj to SDK-style format
-2. Add the required properties (`UseUwp`, `EnableMsixTooling`, `PublishAot`)
+2. Add the required properties - `UseUwp`, `EnableMsixTooling`, then `PublishAot` or `SelfContained`
 3. Update NuGet package references to versions compatible with the latest .NET
 
 ### Step 2: Address Native AOT Compatibility
@@ -146,7 +146,7 @@ The following can be set in library projects:
 If your existing app uses a [runtime directives (rd.xml) file](runtime-directives-rd-xml-configuration-file-reference.md) for .NET Native, you'll need to address reflection and trimming requirements differently with Native AOT using attributes and analyzers instead.
 
 > [!TIP]
-Use `[GeneratedBindableCustomProperty]` classes that need `{Binding}` in XAML.  These classes should be marked as `partial`.
+> Use `[GeneratedBindableCustomProperty]` on classes that need `{Binding}` in XAML. These classes should be marked as `partial`.
 
 ### Step 3: Test Thoroughly