[main] Update dependencies from microsoft/testfx (#51423)

Author: SimonZhao888

eng/Version.Details.props

@@ -140,8 +140,8 @@ This file should be imported by eng/Versions.props
     <!-- dotnet/core-setup dependencies -->
     <NETStandardLibraryRefPackageVersion>2.1.0</NETStandardLibraryRefPackageVersion>
     <!-- microsoft/testfx dependencies -->
-    <MicrosoftTestingPlatformPackageVersion>2.1.0-preview.25520.2</MicrosoftTestingPlatformPackageVersion>
-    <MSTestPackageVersion>4.1.0-preview.25520.2</MSTestPackageVersion>
+    <MicrosoftTestingPlatformPackageVersion>2.1.0-preview.25521.2</MicrosoftTestingPlatformPackageVersion>
+    <MSTestPackageVersion>4.1.0-preview.25521.2</MSTestPackageVersion>
   </PropertyGroup>
   <!--Property group for alternate package version names-->
   <PropertyGroup>

eng/Version.Details.xml

@@ -553,13 +553,13 @@
       <Uri>https://github.com/dotnet/dotnet</Uri>
       <Sha>be28ec777bf12db631725399c442448d52093087</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.Testing.Platform" Version="2.1.0-preview.25520.2">
+    <Dependency Name="Microsoft.Testing.Platform" Version="2.1.0-preview.25521.2">
       <Uri>https://github.com/microsoft/testfx</Uri>
-      <Sha>d4c42dc54c6dd64f61c41349180ab19b621a9895</Sha>
+      <Sha>c0c8cc1bc4a2d489279563def7b8ff830aa8160d</Sha>
     </Dependency>
-    <Dependency Name="MSTest" Version="4.1.0-preview.25520.2">
+    <Dependency Name="MSTest" Version="4.1.0-preview.25521.2">
       <Uri>https://github.com/microsoft/testfx</Uri>
-      <Sha>d4c42dc54c6dd64f61c41349180ab19b621a9895</Sha>
+      <Sha>c0c8cc1bc4a2d489279563def7b8ff830aa8160d</Sha>
     </Dependency>
     <Dependency Name="Microsoft.Extensions.Configuration.Ini" Version="10.0.0-rc.1.25515.110">
       <Uri>https://github.com/dotnet/dotnet</Uri>