ci: fix upload-artifact

Author: spacemeowx2

.github/workflows/codecov.yml

@@ -28,7 +28,7 @@ jobs:
         with:
           token: ${{secrets.CODECOV_TOKEN}}
       - name: Archive code coverage results
-        uses: actions/upload-artifact@v1
+        uses: actions/upload-artifact@v4
         with:
           name: code-coverage-report
           path: cobertura.xml