Update to WASDK 1.5.4 (#1568)

## Description

- Update WASDK dependency to latest stable: [1.5.4
](https://www.nuget.org/packages/Microsoft.WindowsAppSDK/1.5.240607001)
- Update WinUI-Gallery version number to 2.4.2.1

WinUIGallery/Package.Dev.appxmanifest

@@ -7,7 +7,7 @@
     xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"
     IgnorableNamespaces="uap mp uap3">
   <!--Note: package version and assembly version must be kept in sync-->
-  <Identity Name="Microsoft.WinUI3ControlsGallery.Debug" Publisher="CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US" Version="2.4.2.0" />
+  <Identity Name="Microsoft.WinUI3ControlsGallery.Debug" Publisher="CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US" Version="2.4.2.1" />
   <mp:PhoneIdentity PhoneProductId="863667e0-667a-4bb4-ac52-c59656c7333a" PhonePublisherId="00000000-0000-0000-0000-000000000000" />
   <Properties>
     <DisplayName>WinUI 3 Gallery Dev</DisplayName>

WinUIGallery/Package.appxmanifest

@@ -7,7 +7,7 @@
     xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"
     IgnorableNamespaces="uap mp uap3">
   <!--Note: package version and assembly version must be kept in sync-->
-  <Identity Name="Microsoft.WinUI3ControlsGallery" Publisher="CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US" Version="2.4.2.0" />
+  <Identity Name="Microsoft.WinUI3ControlsGallery" Publisher="CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US" Version="2.4.2.1" />
   <mp:PhoneIdentity PhoneProductId="863667e0-667a-4bb4-ac52-c59656c7333a" PhonePublisherId="00000000-0000-0000-0000-000000000000" />
   <Properties>
     <DisplayName>WinUI 3 Gallery</DisplayName>

WinUIGallery/Properties/AssemblyInfo.cs

@@ -25,6 +25,6 @@
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
 // Note: package version and assembly version must be kept in sync
-[assembly: AssemblyVersion("2.4.2.0")]
-[assembly: AssemblyFileVersion("2.4.2.0")]
+[assembly: AssemblyVersion("2.4.2.1")]
+[assembly: AssemblyFileVersion("2.4.2.1")]
 [assembly: ComVisible(false)]

standalone.props

@@ -1,7 +1,7 @@
 <Project>
   <PropertyGroup>
     <!-- The NuGet versions of dependencies to build against. -->
-    <WindowsAppSdkPackageVersion>1.5.240227000</WindowsAppSdkPackageVersion>
+    <WindowsAppSdkPackageVersion>1.5.240607001</WindowsAppSdkPackageVersion>
     <MicrosoftNETCoreUniversalWindowsPlatformVersion>6.2.11</MicrosoftNETCoreUniversalWindowsPlatformVersion>
     <GraphicsWin2DVersion>1.0.4</GraphicsWin2DVersion>
     <ColorCodeVersion>2.0.13</ColorCodeVersion>