ci: pass StrideGraphicsApi to Windows game test matrix

Without the singular form, Stride.Graphics.props defaults it to
Direct3D11 before the test SDK can derive it from StrideGraphicsApis.

Author: xen2

.github/workflows/test-windows-game.yml

@@ -161,14 +161,16 @@ jobs:
             -v:m -p:WarningLevel=0 `
             -p:Configuration=${{ github.event.inputs.build-type || inputs.build-type || 'Debug' }} `
             -p:StridePlatforms=Windows `
-            -p:StrideGraphicsApis=${{ matrix.graphics-api }}
+            -p:StrideGraphicsApis=${{ matrix.graphics-api }} `
+            -p:StrideGraphicsApi=${{ matrix.graphics-api }}
       - name: Test
         run: |
           dotnet test build\Stride.Tests.Game.GPU.slnf `
             --no-build `
             --logger:trx --results-directory TestResults `
             -p:Configuration=${{ github.event.inputs.build-type || inputs.build-type || 'Debug' }} `
             -p:StrideGraphicsApis=${{ matrix.graphics-api }} `
+            -p:StrideGraphicsApi=${{ matrix.graphics-api }} `
             -- RunConfiguration.MaxCpuCount=1
       - name: Publish Test Report
         if: always()