Add net10.0 target to unit test projects

Updated the TargetFrameworks in both CommunityToolkit.Mvvm.Roslyn5000.UnitTests and CommunityToolkit.Mvvm.SourceGenerators.Roslyn5000.UnitTests projects to include net10.0 for future .NET compatibility testing.

Author: Sergio0694

tests/CommunityToolkit.Mvvm.Roslyn5000.UnitTests/CommunityToolkit.Mvvm.Roslyn5000.UnitTests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;net8.0;net9.0</TargetFrameworks>
+    <TargetFrameworks>net472;net8.0;net9.0;net10.0</TargetFrameworks>
     <LangVersion>14.0</LangVersion>
     <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings>
     <DefineConstants>$(DefineConstants);ROSLYN_4_12_0_OR_GREATER;ROSLYN_5_0_0_OR_GREATER</DefineConstants>

tests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn5000.UnitTests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn5000.UnitTests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;net8.0;net9.0</TargetFrameworks>
+    <TargetFrameworks>net472;net8.0;net9.0;net10.0</TargetFrameworks>
     <DefineConstants>$(DefineConstants);ROSLYN_4_3_1_OR_GREATER;ROSLYN_4_12_0_OR_GREATER;ROSLYN_5_0_0_OR_GREATER</DefineConstants>
   </PropertyGroup>