Update codecov/codecov-action action to v4

Author: renovate[bot]

.github/workflows/coverage.yml

@@ -25,7 +25,7 @@ jobs:
           args: '--out Lcov'
 
       - name: Upload to codecov.io
-        uses: codecov/codecov-action@v3.0.0
+        uses: codecov/codecov-action@v4.3.0
         with:
           token: ${{secrets.CODECOV_TOKEN}}