[DOCFIX] Fix ambiguous description for impersonation in CN doc
[DOCFIX] Fix ambiguous description for impersonation in CN doc

### What changes are proposed in this pull request?

The Chinese document describes that the master side needs to be modified
to configure impersonation, but it does not specify the worker.

### Why are the changes needed?
Referring to the original document may cause incomplete configuration.

### Does this PR introduce any user facing changes?
no

pr-link: Alluxio/alluxio#15253
change-id: cid-0eddfeafbd74f8ae36c6273afa404fc2e356fc46
Alluxio/alluxio,Alluxio/alluxio,wwjiang007/alluxio,wwjiang007/alluxio,wwjiang007/alluxio,Alluxio/alluxio,Alluxio/alluxio,Alluxio/alluxio,Alluxio/alluxio,wwjiang007/alluxio,wwjiang007/alluxio,wwjiang007/alluxio,wwjiang007/alluxio,wwjiang007/alluxio,Alluxio/alluxio,Alluxio/alluxio,wwjiang007/alluxio,wwjiang007/alluxio,Alluxio/alluxio,Alluxio/alluxio