Update codecov/codecov-action action to v5

Author: renovate[bot]

.github/workflows/codecov.yml

@@ -17,7 +17,7 @@ jobs:
           ruby-version: '3.1'
       - run: bundle update
       - run: bundle exec rake
-      - uses: codecov/codecov-action@v4
+      - uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           fail_ci_if_error: true