Change artifact name from coverage-report to coverage.xml

small change since the report is not being found. this is one of many small PRs to try and get this working.

.github/workflows/sonarcloud_pr.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Download coverage report artifact
         uses: actions/download-artifact@v4
         with:
-          name: coverage-report
+          name: coverage.xml
           path: reports/
           github-token: ${{ secrets.GITHUB_TOKEN }}
           run-id: ${{ github.event.workflow_run.id }}