fix: html semantics (base issue)

[Ubugeeei]

🎯 Aim

• Correctly write the HTML in the sample code
  • To prevent learners from picking up incorrect HTML

---

Todo

• button type
• img alt
  tweak: #212 🔧 img alt attr #215
• input label fix: html semantics (base issue) #212 (comment)
  other: #212 🔹 add input label #216
• etc...

[yamanoku]

<label> element associated with <input> element.

https://github.com/yamanoku/chibivue/blob/3cad13aa2c6ab7a7f543bafc6451fdc6376e0e8a/book/impls/10_minimum_example/070_sfc_compiler2/examples/playground/src/App.vue#L34

<label>
  Input Data
  <input @input="handleInput" />
</label>


<label for="example">Input Data</label>
<input id="example" type="text" @input="handleInput">