Changed WPF Test Runtime (#9337)

Author: dipeshmsft

eng/pipeline-pr.yml

@@ -202,28 +202,28 @@ jobs:
         displayName: Install .NET Core
         inputs:
           filePath: $(Build.SourcesDirectory)/dotnet-test-install.ps1
-          arguments: -InstallDir $(_programfiles) -Architecture $(_Platform) -Runtime dotnet  -Channel 8.0 -Quality daily
+          arguments: -InstallDir $(_programfiles) -Architecture $(_Platform) -Runtime dotnet  -Channel 9.0 -Quality daily
           condition: eq(variables['_Platform'], 'x64')
 
       - task: PowerShell@2
         displayName: Install .NET Core(x86)
         inputs:
           filePath: $(Build.SourcesDirectory)/dotnet-test-install.ps1
-          arguments: -InstallDir $(_programfilesx86) -Architecture $(_Platform) -Runtime dotnet  -Channel 8.0 -Quality daily
+          arguments: -InstallDir $(_programfilesx86) -Architecture $(_Platform) -Runtime dotnet  -Channel 9.0 -Quality daily
         condition: eq(variables['_Platform'], 'x86')
 
       - task: PowerShell@2
         displayName: Install .NET WindowsDesktop
         inputs:
           filePath: $(Build.SourcesDirectory)/dotnet-test-install.ps1
-          arguments: -InstallDir $(_programfiles) -Architecture $(_Platform) -Runtime windowsdesktop  -Channel 8.0 -Quality daily
+          arguments: -InstallDir $(_programfiles) -Architecture $(_Platform) -Runtime windowsdesktop  -Channel 9.0 -Quality daily
         condition: eq(variables['_Platform'], 'x64')
 
       - task: PowerShell@2
         displayName: Install .NET WindowsDesktop(x86)
         inputs:
           filePath: $(Build.SourcesDirectory)/dotnet-test-install.ps1
-          arguments: -InstallDir $(_programfilesx86) -Architecture $(_Platform) -Runtime windowsdesktop  -Channel 8.0 -Quality daily
+          arguments: -InstallDir $(_programfilesx86) -Architecture $(_Platform) -Runtime windowsdesktop  -Channel 9.0 -Quality daily
         condition: eq(variables['_Platform'], 'x86')  
 
       - task: PowerShell@2