[Docs] We should alter styling for examples to avoid Deprecation Warnings in the console

[AMBudnik]

Description

We should alter styling for examples to avoid Deprecation Warnings in the console.

I identified the issue on the Vue page but it might relate to other examples with added buttons as well.

Video or screenshots

Demo

https://hyperformula.handsontable.com/guide/integration-with-vue.html#demo

HyperFormula version

latest

Your framework

No response

Your environment

Chrome 133/macOS Ventura