Cheatsheet Example is missing a normal select from Forms Overview

Created by: coliff

Prerequisites

• I have searched for duplicate or closed feature requests
• I have read the contributing guidelines

Proposal

The Forms overview section doesn't include a standard <select>. There is a select in the Disabled forms section, and examples of large and small size and validation state.

Motivation and context

It could be useful to include a standard form-select in the overview section too showing its default styling. I suggest it'd go above the Radio buttons so it matches the Disabled forms section below.