[Validator] Update validators.zh_CN.xlf, fix translation error

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | 
| License       | MIT
| Doc PR        | 

I can't find any previous use of this translation `此字段多余` but I can find one of this similar variant: `此字段多余的`

What do you think? It's your proposal more accurate? 谢谢!