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

Author: renovate[bot]

.github/workflows/python-package.yml

@@ -31,7 +31,7 @@ jobs:
     - name: Test SpectraFit
       run: uv run --group dev --all-extras pytest umf/
     - name: Codecov
-      uses: codecov/codecov-action@v4.6.0
+      uses: codecov/codecov-action@v5.4.0
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         env_vars: OS,PYTHON