fix(ci): update codecov-action for tokenless uploads

- per https://docs.codecov.com/docs/codecov-tokens#uploading-without-a-token, it seems a newer version is required now

Author: agilgur5

.github/workflows/ci.yml

@@ -32,4 +32,4 @@ jobs:
     - name: Test w/ coverage report
       run: npm run test:coverage
     - name: Upload coverage report to Codecov
-      uses: codecov/codecov-action@v2
+      uses: codecov/codecov-action@v5