Update dependencies from https://github.com/microsoft/testfx build 20250930.8

On relative base path root
Microsoft.Testing.Platform From Version 1.9.0-preview.25479.5 -> To Version 1.9.0-preview.25480.8
MSTest From Version 3.11.0-preview.25479.5 -> To Version 3.11.0-preview.25480.8

Author: dotnet-maestro[bot]

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>1.9.0-preview.25479.5</MicrosoftTestingPlatformPackageVersion>
-    <MSTestPackageVersion>3.11.0-preview.25479.5</MSTestPackageVersion>
+    <MicrosoftTestingPlatformPackageVersion>1.9.0-preview.25480.8</MicrosoftTestingPlatformPackageVersion>
+    <MSTestPackageVersion>3.11.0-preview.25480.8</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>6befeceeaece5c9cb9730878aeaf4667f7c29b70</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.Testing.Platform" Version="1.9.0-preview.25479.5">
+    <Dependency Name="Microsoft.Testing.Platform" Version="1.9.0-preview.25480.8">
       <Uri>https://github.com/microsoft/testfx</Uri>
-      <Sha>fb48f61b25dd221f0b7568863080ab5339df8def</Sha>
+      <Sha>8528019fe7f6a96667fb345da2d433fb6a01ec19</Sha>
     </Dependency>
-    <Dependency Name="MSTest" Version="3.11.0-preview.25479.5">
+    <Dependency Name="MSTest" Version="3.11.0-preview.25480.8">
       <Uri>https://github.com/microsoft/testfx</Uri>
-      <Sha>fb48f61b25dd221f0b7568863080ab5339df8def</Sha>
+      <Sha>8528019fe7f6a96667fb345da2d433fb6a01ec19</Sha>
     </Dependency>
     <Dependency Name="Microsoft.Extensions.Configuration.Ini" Version="10.0.0-rc.1.25479.108">
       <Uri>https://github.com/dotnet/dotnet</Uri>