chore: fix typo for CloudDNS

[wan92hen]

What this PR does / why we need it?

Fix typo according to CloudDNS's official website https://www.cloudns.net/

Summary of your change

Only change text of the frontend element into CloudDNS, and remain others unchanged for compatibility.

Please indicate you've done the following:

• Made sure tests are passing and test coverage is added if needed.
• Made sure commit message follow the rule of Conventional Commits specification.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed.

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