Incorrect updated time for the Service Account

Created by: wenxin-01

Environment nightly-20210307

Preset conditions 1、There is account A, which has project 'B' management privileges.

To Reproduce Steps to reproduce the behavior:

1. Use account A to log in to KS, and go to Project 'B'--》Configurations--》ServiceAccounts.
2. Click ’default‘
3. check update time

Expected behavior The updated time is not displayed

Actual behavior

/kind bug /assign @xuliwenwenwen /milestone 3.1.0 /priority medium