[bugfix]: update feature.rst

[chengmengli06]

fix typo

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[github-actions[bot]]

CI PY3 Test Passed

[github-actions[bot]]

CI Test Passed