switch start_time or end_time to query online statistics, api/v1/publish/statistics报错400

[zhanghuidinah]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Go to '上线次数统计'
2. Click on '更换start_time or end_time'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

• 可按所选时间范围查询上线次数统计
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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Server Version

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- Kubernetes version:
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Additional context
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[wilhelmguo]

Fixed!