Update pull-request.yml

Author: ArgoZhang

.github/workflows/pull-request.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Test
         run: |
           dotnet test test/UnitTest -c Release --collect:"XPlat Code Coverage" -r ./coverage
-
+          find ./coverage ./tests -name "*coverage*.xml" -type f -exec cp {} ./ \;
       - name: Upload to Codecov
         uses: codecov/codecov-action@v3
         with: