docs: Fix incorrectly displayed UI text.

Created by: serenashe

Signed-off-by: serenashe serenashe@kubesphere.io

What type of PR is this?

/kind documentation

What this PR does / why we need it:

Fix incorrectly displayed UI text. Before: After:

Special notes for reviewers:

None

Does this PR introduced a user-facing change?

None

/assign @harrisonliu5 Please take a look, thanks.