What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind bug

What does this PR do / why do we need it:
modify export file name

Which issue(s) this PR fixes:

Fixes #https://gitee.com/mind_spore/dashboard?issue_id=I25Y8K

Special notes for your reviewers: