chore(deps): update codecov/codecov-action action to v4 (#693)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/pr-checks.yml

@@ -49,7 +49,7 @@ jobs:
         run: make unit-test
 
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           flags: unit-tests