copilot fix for error "The specified RuntimeIdentifier '.testcoverage' is not recognized"

Author: charlesroddie

.github/workflows/Test.yml

@@ -34,7 +34,7 @@ jobs:
         
         # --collect:"XPlat Code Coverage" means collect test coverage with https://github.com/coverlet-coverage/coverlet
         # Coverlet settings come after --: https://github.com/coverlet-coverage/coverlet/blob/master/Documentation/VSTestIntegration.md#advanced-options-supported-via-runsettings
-        dotnet test CSharpMath.CrossPlatform.slnf -c Release -l GitHubActions --blame --collect:"XPlat Code Coverage" -r .testcoverage -p:PackageReleaseNotes="$RELEASE_NOTES" -p:PackageVersion=${{ steps.release_drafter.outputs.tag_name || format('{0}-pr', github.event.number) }}-ci-${{ github.sha }} -- DataCollectionRunSettings.DataCollectors.DataCollector.Configuration.IncludeTestAssembly=true
+        dotnet test CSharpMath.CrossPlatform.slnf -c Release -l GitHubActions --blame --collect:"XPlat Code Coverage" --results-directory .testcoverage -p:PackageReleaseNotes="$RELEASE_NOTES" -p:PackageVersion=${{ steps.release_drafter.outputs.tag_name || format('{0}-pr', github.event.number) }}-ci-${{ github.sha }} -- DataCollectionRunSettings.DataCollectors.DataCollector.Configuration.IncludeTestAssembly=true
     - name: Run ReportGenerator on Test Coverage results
       uses: danielpalme/ReportGenerator-GitHub-Action@5
       with: