typo: fix misspell in test code

[XSAM]

Ⅰ. Describe what this PR did

fix some typo

Ⅱ. Does this pull request fix one issue?

Ⅲ. Describe how you did it

confilct -> conflict

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[pouchrobot]

@XSAM Thanks for your contribution. 🍻
Please sign off in each of your commits.

[pouchrobot]

We found this is your first time to contribute to Pouch, @XSAM
👏 We really appreciate it.
Just remind that you have read the contribution guide: https://github.com/alibaba/pouch/blob/master/CONTRIBUTING.md
If you didn't, you should do that first. If done, welcome again and please enjoy hacking! 🍻

[CLAassistant]

All committers have signed the CLA.

[allencloud]

LGTM, thanks a lot for your hacking. @XSAM
🍻