docs: Add role="switch" to switches (#34824)
docs: Add role="switch" to switches (#34824)

* docs: Add role="switch" to switches

* Tweak/expand explanation about assistive technologies

Co-authored-by: Patrick H. Lauke <80c932ecf5690593501454b17cd0c9a116b41243@splintered.co.uk>
inway/bootstrap,m5o/bootstrap,inway/bootstrap,tjkohli/bootstrap,m5o/bootstrap,coliff/bootstrap,twbs/bootstrap,coliff/bootstrap,tjkohli/bootstrap,inway/bootstrap,twbs/bootstrap