chore(deps): update codecov/codecov-action action to v5.2.0

Author: renovate[bot]

.github/workflows/python-ci.yml

@@ -69,7 +69,7 @@ jobs:
       - name: Test SpectraFit
         run: poetry run pytest
       - name: Codecov
-        uses: codecov/codecov-action@v5.1.2
+        uses: codecov/codecov-action@v5.2.0
         with:
           name: codecov-umbrella
           flags: unittests