fix: Update gateway delete tip text
Created by: weili520
Signed-off-by: TheYoungManLi cjl@kubesphere.io
What type of PR is this?
/kind bug
What this PR does / why we need it:
Which issue(s) this PR fixes:
Fixes ##2697 (closed)
Special notes for reviewers:
Does this PR introduced a user-facing change?
NONE