chore(deps): update codecov/codecov-action action to v5.4.2

Author: renovate[bot]

.github/workflows/python-package.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Test SpectraFit
         run: uv run --group dev --all-extras pytest umf/
       - name: Codecov
-        uses: codecov/[email protected].0
+        uses: codecov/[email protected].2
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           env_vars: OS,PYTHON