Update dorny/test-reporter action to v2

Author: renovate[bot]

.github/workflows/build.yml

@@ -28,7 +28,7 @@ jobs:
         run: ./build.sh ${{steps.gitversion.outputs.nuGetVersion}}
       - name: Report test results
         if: always()
-        uses: dorny/test-reporter@v1
+        uses: dorny/test-reporter@v2
         with:
           name: Test Report
           reporter: dotnet-trx