ci: try to fix coverage upload

Author: bluetech

.github/workflows/main.yml

@@ -55,7 +55,7 @@ jobs:
 
       - name: Report coverage
         if: contains(matrix.name, 'coverage')
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           fail_ci_if_error: true
           files: ./coverage.xml