Update object_post.py

[cloudfee]

fix: word error

[coveralls]

Coverage decreased (-0.08%) to 30.227% when pulling 171a7e0 on cloudfee:patch-1 into 946e64f on aliyun:master.

[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.}