specify arm64 for test

Author: taooceros

.github/workflows/dotnet.yml

@@ -67,7 +67,7 @@ jobs:
           sc config WSearch start= auto # Starts Windows Search service- Needed for running ExplorerTest
           net start WSearch
       - name: Test
-        run: dotnet test --no-build --verbosity normal -c Release
+        run: dotnet test --no-build --verbosity normal -c Release -p:FlowRuntimeIdentifier=win-arm64
       - name: Perform post_build tasks
         shell: pwsh
         run: .\Scripts\post_build.ps1 -flowversion "${env:FlowVersion}-build.${env:BUILD_NUMBER}"