[Style] [step] el-step组件使用icon插槽时，class是否应该是is-icon，而不是is-text

[wen-lun]

Bug Type: Style

Environment

• Vue Version: 3.2.37
• Element Plus Version: 2.2.8
• Browser / OS: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.71 Safari/537.36 Core/1.94.169.400 QQBrowser/11.0.5130.400
• Build Tool: Vite

Reproduction

Related Component

• el-step

Reproduction Link

Element Plus Playground

Steps to reproduce

使用el-step组件的icon插槽

What is Expected?

el-step组件的class应该是is-icon

What is actually happening?

el-step组件的class是is-text

Additional comments

(empty)