Docs: update form.md (#21902)

examples/docs/en-US/form.md

@@ -476,7 +476,7 @@ Custom validate callback function must be called. See more advanced usage at [as
       { type: 'number', message: 'age must be a number'}
     ]"
   >
-    <el-input type="age" v-model.number="numberValidateForm.age" autocomplete="off"></el-input>
+    <el-input v-model.number="numberValidateForm.age" autocomplete="off"></el-input>
   </el-form-item>
   <el-form-item>
     <el-button type="primary" @click="submitForm('numberValidateForm')">Submit</el-button>

examples/docs/es/form.md

@@ -485,7 +485,7 @@ Se debe llamar a la función de validación de llamada de retorno personalizada.
       { type: 'number', message: 'age must be a number'}
     ]"
   >
-    <el-input type="age" v-model.number="numberValidateForm.age" autocomplete="off"></el-input>
+    <el-input v-model.number="numberValidateForm.age" autocomplete="off"></el-input>
   </el-form-item>
   <el-form-item>
     <el-button type="primary" @click="submitForm('numberValidateForm')">Submit</el-button>

examples/docs/fr-FR/form.md

@@ -475,7 +475,7 @@ Les callback de validations personnalisées doivent être appelées. Un usage pl
       { type: 'number', message: 'l\'âge doit être un nombre'}
     ]"
   >
-    <el-input type="age" v-model.number="numberValidateForm.age" autocomplete="off"></el-input>
+    <el-input v-model.number="numberValidateForm.age" autocomplete="off"></el-input>
   </el-form-item>
   <el-form-item>
     <el-button type="primary" @click="submitForm('numberValidateForm')">Soumettre</el-button>

examples/docs/zh-CN/form.md

@@ -470,7 +470,7 @@ W3C 标准中有如下[规定](https://www.w3.org/MarkUp/html-spec/html-spec_8.h
       { type: 'number', message: '年龄必须为数字值'}
     ]"
   >
-    <el-input type="age" v-model.number="numberValidateForm.age" autocomplete="off"></el-input>
+    <el-input v-model.number="numberValidateForm.age" autocomplete="off"></el-input>
   </el-form-item>
   <el-form-item>
     <el-button type="primary" @click="submitForm('numberValidateForm')">提交</el-button>