回车后表单提交事件不执行

#### 描述问题：

Form 表单设置了回车提交，回车input 不会执行表单提交，点击提交按钮会执行

#### 截图或视频：

、


#### 如何复现（请务必完整填写下面内容）：

1. 你是如何使用 amis 的？
`sdk`、`npm` 或`其他`...

npm

2. amis 版本是什么？请先在最新 beta 版本测试问题是否存在
"amis": "6.11.0",
"amis-core": "6.11.0",
"amis-editor": "6.11.0",
"amis-editor-core": "6.11.0",
"amis-formula": "6.11.0",
"amis-widget": "^3.2.2",

3. 粘贴有问题的完整 `amis schema` 代码：
{
"type": "form",
"id": "u:4cb7093c2e45",
"title": "表单",
"mode": "flex",
"labelAlign": "top",
"dsType": "api",
"feat": "Insert",
"body": [
{
"type": "input-text",
"label": "文本",
"name": "text",
"row": 0,
"id": "u:262ed3ccab80"
}
],
"actions": [
{
"type": "button",
"label": "提交",
"onEvent": {
"click": {
"actions": [
{
"actionType": "submit",
"componentId": "u:4cb7093c2e45"
}
]
}
},
"level": "primary",
"id": "u:d0e556616013"
}
],
"resetAfterSubmit": true,
"onEvent": {
"submit": {
"weight": 0,
"actions": [
{
"ignoreError": false,
"actionType": "custom",
"script": "alert(1)",
"args": {}
}
]
}
}
}

4. 操作步骤
请简单描述一下复现的操作步骤...

Reproduce the issue with the provided AMIS form schema using the listed npm 6.11.0 packages, comparing Enter in the input with clicking the submit button. Start by tracing the form submit event and keyboard handling; done means Enter triggers the same submit event and custom alert as the button.

Written by the indexing model from the issue text.