Update api-ci.yml

Author: tom0827

.github/workflows/api-ci.yml

@@ -91,7 +91,7 @@ jobs:
          if: github.event_name == 'pull_request'
 
        - name: Upload coverage to Codecov
-         uses: codecov/codecov-action@v3
+         uses: codecov/codecov-action@v4
          with:
           flags: epictrack-api
           name: codecov-epictrack-api