fix: The UI text on the Service Monitoring Exporter page goes out of box

Created by: mangoGoForward

Signed-off-by: mango xu.weiKyrie@foxmail.com

What type of PR is this?

/kind bug

What this PR does / why we need it:

Please see the issue #2647 (closed)

Which issue(s) this PR fixes:

Fixes #2647 (closed)

Special notes for reviewers:

Does this PR introduced a user-facing change?

None