chore(deps): update codecov/codecov-action action to v6

Author: renovate[bot]

.github/workflows/python-tests.yml

@@ -60,7 +60,7 @@ jobs:
     - name: Run tests
       run: hatch test --python ${{ matrix.python-version }} --cover --randomize --retries 2 --retry-delay 1
 
-    - uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5.5.2
+    - uses: codecov/codecov-action@57e3a136b779b570ffcdbf80b3bdc90e7fab3de2 # v6.0.0
       with:
         name: "build-${{ matrix.python-version }}"
         fail_ci_if_error: true