Use sonar.coverageReportPaths for Cobertura coverage in SonarCloud

Co-authored-by: 304NotModified <5808377+304NotModified@users.noreply.github.com>

Author: Copilot

.github/workflows/sonarcloud.yml

@@ -38,7 +38,7 @@ jobs:
             /o:"304notmodified" \
             /d:sonar.token="${SONAR_TOKEN}" \
             /d:sonar.host.url="https://sonarcloud.io" \
-            /d:sonar.cs.cobertura.reportsPaths="**/TestResults/**/*.cobertura.xml"
+            /d:sonar.coverageReportPaths="**/TestResults/**/*.cobertura.xml"
 
       - name: Build
         run: dotnet build SLNX-validator.slnx --no-restore -c Release