Fix variable name in form overview docs (#35468)
Fix variable name in form overview docs (#35468)

These variables are called $input-btn-*, the documentation was erroneously talking about $btn-input-*.

Co-authored-by: XhmikosR <b60f67e10123951b393d9ba15dcf79efc14744bb@gmail.com>
inway/bootstrap,m5o/bootstrap,m5o/bootstrap,twbs/bootstrap,tjkohli/bootstrap,inway/bootstrap,twbs/bootstrap,inway/bootstrap,coliff/bootstrap,coliff/bootstrap,tjkohli/bootstrap