Update codecov/codecov-action action to v6

Author: renovate[bot]

.github/workflows/verify.yml

@@ -176,7 +176,7 @@ jobs:
           coverage report --fail-under=80
           coverage xml
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
           slug: CoMPaTech/python-airos