Update dependencies from https://github.com/microsoft/testfx build 20251021.2

On relative base path root
Microsoft.Testing.Platform From Version 2.1.0-preview.25520.2 -> To Version 2.1.0-preview.25521.2
MSTest From Version 4.1.0-preview.25520.2 -> To Version 4.1.0-preview.25521.2

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -17,13 +17,13 @@
       <Uri>https://dev.azure.com/devdiv/DevDiv/_git/vs-code-coverage</Uri>
       <Sha>b3ec110c7b23b6f726c516763f6810e74be7b192</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.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>
   </ToolsetDependencies>
 </Dependencies>

eng/Versions.props

@@ -10,7 +10,7 @@
     <MicrosoftDotNetBuildTasksTemplatingPackageVersion>11.0.0-beta.25520.4</MicrosoftDotNetBuildTasksTemplatingPackageVersion>
     <MicrosoftTestingExtensionsCodeCoverageVersion>18.1.0-preview.25507.2</MicrosoftTestingExtensionsCodeCoverageVersion>
     <!-- empty line to avoid merge conflicts for darc PRs to update CC and MSTest+MTP -->
-    <MSTestVersion>4.1.0-preview.25520.2</MSTestVersion>
-    <MicrosoftTestingPlatformVersion>2.1.0-preview.25520.2</MicrosoftTestingPlatformVersion>
+    <MSTestVersion>4.1.0-preview.25521.2</MSTestVersion>
+    <MicrosoftTestingPlatformVersion>2.1.0-preview.25521.2</MicrosoftTestingPlatformVersion>
   </PropertyGroup>
 </Project>