minor symfony#61586 [Validator] Unify & more humane translation message for zh_CN (siganushka)

This PR was submitted for the 7.4 branch but it was merged into the 6.4 branch instead.

Discussion
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[Validator] Unify & more humane translation message for zh_CN

| Q             | A
| ------------- | ---
| Branch?       | 7.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| License       | MIT

Unify the translation message style and make the translation message more humane (the current one is too rigid)

Commits
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cc4ae62 refactor: Unify & more humane translation message

Author: fabpot