chore(deps): update codecov/codecov-action action to v6 (openedx#118)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -30,7 +30,7 @@ jobs:
     - name: i18n_extract
       run: npm run i18n_extract
     - name: Coverage
-      uses: codecov/codecov-action@v4
+      uses: codecov/codecov-action@v6
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         fail_ci_if_error: true